<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cc4aa-280e-7ee0-a2b3-704bbace2c25,g:82153193-fabf-412b-a14c-df95f63d7b9f-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.northrim.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="nrim-20260331.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cc4aa-2d60-79d4-9f67-89ff888dac51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:to="loc_us-gaap_StatementTable_019cc4aa-2d60-79d4-9f67-89ff888dac51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cc4aa-2d60-79d4-9f67-89ff888dac51" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d60-7a06-9d34-0c19b2f82afc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d60-7f85-bca3-7c88e5cd0a39" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d60-7a06-9d34-0c19b2f82afc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2d60-7485-9cc1-443058a5732d" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d60-7a06-9d34-0c19b2f82afc" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2d60-7485-9cc1-443058a5732d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:to="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndDueFromBanks_019cc4aa-2d60-7176-b9c7-e6926fc084fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndDueFromBanks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_CashAndDueFromBanks_019cc4aa-2d60-7176-b9c7-e6926fc084fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_019cc4aa-2d60-7db6-9f70-42bd6333d555" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestBearingDepositsInBanks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_InterestBearingDepositsInBanks_019cc4aa-2d60-7db6-9f70-42bd6333d555" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2d60-7139-aa67-7772be832000" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2d60-7139-aa67-7772be832000" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d60-70bc-8fd8-ba9c82453008" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d60-70bc-8fd8-ba9c82453008" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2d60-7bf9-96cd-01f1a03d428f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2d60-7bf9-96cd-01f1a03d428f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalHomeLoanBankStock_019cc4aa-2d60-7d6b-b64c-da27c1b2e1d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FederalHomeLoanBankStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_FederalHomeLoanBankStock_019cc4aa-2d60-7d6b-b64c-da27c1b2e1d6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_019cc4aa-2d60-7539-ba99-874906b383e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_019cc4aa-2d60-7539-ba99-874906b383e4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d60-7e29-8efc-7dedd8a51b97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d60-7e29-8efc-7dedd8a51b97" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d60-7135-8c48-f80dff19a35c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d60-7135-8c48-f80dff19a35c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2d60-7dbe-b8de-60221b289909" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2d60-7dbe-b8de-60221b289909" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019cc4aa-2d60-7542-8e2a-1b2f1ae74c77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_AccountsReceivableNet_019cc4aa-2d60-7542-8e2a-1b2f1ae74c77" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2d60-742a-b225-287ec05801f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2d60-742a-b225-287ec05801f9" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateAcquiredThroughForeclosure_019d9417-587c-7b7f-8688-08fea36d893c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealEstateAcquiredThroughForeclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_RealEstateAcquiredThroughForeclosure_019d9417-587c-7b7f-8688-08fea36d893c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019cc4aa-2d60-7519-8e8a-6670fcf9a3fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019cc4aa-2d60-7519-8e8a-6670fcf9a3fd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cc4aa-2d60-7ecd-b6f0-ca5ff3989573" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cc4aa-2d60-7ecd-b6f0-ca5ff3989573" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cc4aa-2d60-7fc6-a0bd-7c6b7606089d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_Goodwill_019cc4aa-2d60-7fc6-a0bd-7c6b7606089d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cc4aa-2d60-7c36-88f3-8a6b84e59caa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cc4aa-2d60-7c36-88f3-8a6b84e59caa" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019cc4aa-2d60-7771-9c56-05e6544d2ee0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_OtherAssets_019cc4aa-2d60-7771-9c56-05e6544d2ee0" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cc4aa-2d60-78c9-b5c4-e9b763e376d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cc4aa-2d60-77c5-b0f2-4889f14f7339" xlink:to="loc_us-gaap_Assets_019cc4aa-2d60-78c9-b5c4-e9b763e376d2" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:to="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:to="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DemandDepositAccounts_019cc4aa-2d60-76ab-a76d-7bd40f6f82e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DemandDepositAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_DemandDepositAccounts_019cc4aa-2d60-76ab-a76d-7bd40f6f82e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_019cc4aa-2d60-7b96-8966-41b37c0cdffd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestBearingDepositLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_InterestBearingDepositLiabilities_019cc4aa-2d60-7b96-8966-41b37c0cdffd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsSavingsDeposits_019cc4aa-2d60-741f-b4a6-a37bc5868f0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsSavingsDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_DepositsSavingsDeposits_019cc4aa-2d60-741f-b4a6-a37bc5868f0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits_019cc4aa-2d60-73d7-845e-b510e0f8294e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsMoneyMarketDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_DepositsMoneyMarketDeposits_019cc4aa-2d60-73d7-845e-b510e0f8294e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDeposits_019d9415-9607-7e99-b48d-e6632c0107f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimeDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_TimeDeposits_019d9415-9607-7e99-b48d-e6632c0107f8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_019cc4aa-2d60-7a36-9ae2-c70b906e772d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Deposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019cc4aa-2d60-7e39-9158-ffa05f15d978" xlink:to="loc_us-gaap_Deposits_019cc4aa-2d60-7a36-9ae2-c70b906e772d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019da8db-a1af-79a3-86e0-3c10e482fac8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:to="loc_us-gaap_LongTermDebt_019da8db-a1af-79a3-86e0-3c10e482fac8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019cc4aa-2d60-7091-b4ea-21543ced6ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:to="loc_us-gaap_OperatingLeaseLiability_019cc4aa-2d60-7091-b4ea-21543ced6ebb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019cc4aa-2d60-78ae-9ead-3b5bd95b063e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:to="loc_us-gaap_OtherLiabilities_019cc4aa-2d60-78ae-9ead-3b5bd95b063e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019cc4aa-2d60-7da7-9e59-90263cf88461" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cc4aa-2d60-78ab-8cfa-278d1f5066c6" xlink:to="loc_us-gaap_Liabilities_019cc4aa-2d60-7da7-9e59-90263cf88461" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:to="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019cc4aa-2d60-7dcc-82fc-1da9e667ed7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_PreferredStockValue_019cc4aa-2d60-7dcc-82fc-1da9e667ed7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019cc4aa-2d60-7a4a-878b-2863b606d1df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_CommonStockValue_019cc4aa-2d60-7a4a-878b-2863b606d1df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019cc4aa-2d60-731a-bafc-d4ffaed3db4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019cc4aa-2d60-731a-bafc-d4ffaed3db4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019cc4aa-2d60-7667-a817-2fa76030e205" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019cc4aa-2d60-7667-a817-2fa76030e205" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019cc4aa-2d60-78b4-8bd5-e84379bdd24c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019cc4aa-2d60-78b4-8bd5-e84379bdd24c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cc4aa-2d60-7eee-b56e-f90ebcd3f28f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019cc4aa-2d60-741b-a03e-e5ef2f0860b2" xlink:to="loc_us-gaap_StockholdersEquity_019cc4aa-2d60-7eee-b56e-f90ebcd3f28f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cc4aa-2d60-77a4-b23b-ea2643a6f69a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d60-720e-aefd-759e85e7e86c" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cc4aa-2d60-77a4-b23b-ea2643a6f69a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/ConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="nrim-20260331.xsd#ConsolidatedStatementsofIncome"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ConsolidatedStatementsofIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cc4aa-2d61-777a-a06e-0e963a858855" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_StatementTable_019cc4aa-2d61-777a-a06e-0e963a858855" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cc4aa-2d61-76d4-a5f8-a05407f22c7d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cc4aa-2d61-777a-a06e-0e963a858855" xlink:to="loc_srt_ProductOrServiceAxis_019cc4aa-2d61-76d4-a5f8-a05407f22c7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-76d4-a5f8-a05407f22c7d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cc4aa-2d61-76d4-a5f8-a05407f22c7d" xlink:to="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-76d4-a5f8-a05407f22c7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-70bf-a9b6-550b62d4808b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cc4aa-2d61-76d4-a5f8-a05407f22c7d" xlink:to="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-70bf-a9b6-550b62d4808b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditAndDebitCardMember_019cc4aa-2d61-72d7-9797-0565e521a105" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditAndDebitCardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-70bf-a9b6-550b62d4808b" xlink:to="loc_us-gaap_CreditAndDebitCardMember_019cc4aa-2d61-72d7-9797-0565e521a105" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositAccountMember_019cc4aa-2d61-7eca-943d-3e7729e1a489" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cc4aa-2d61-70bf-a9b6-550b62d4808b" xlink:to="loc_us-gaap_DepositAccountMember_019cc4aa-2d61-7eca-943d-3e7729e1a489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019cc4aa-2d61-7ce8-be23-b3cb0bd97f86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019cc4aa-2d61-7ce8-be23-b3cb0bd97f86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeDebtSecuritiesAvailableForSaleOperating_019cc4aa-2d61-770b-9238-838a74812bb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeDebtSecuritiesAvailableForSaleOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_InterestIncomeDebtSecuritiesAvailableForSaleOperating_019cc4aa-2d61-770b-9238-838a74812bb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeEquitySecuritiesOperating_019cc4aa-2d61-77ef-af40-5fa008433bff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeEquitySecuritiesOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_DividendIncomeEquitySecuritiesOperating_019cc4aa-2d61-77ef-af40-5fa008433bff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019cc4aa-2d61-7375-859a-b5b5634b1642" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019cc4aa-2d61-7375-859a-b5b5634b1642" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DividendsOnFederalHomeLoanBankStock_019cc4aa-2d61-70f9-9065-ec45b4faea1b" xlink:href="nrim-20260331.xsd#nrim_DividendsOnFederalHomeLoanBankStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_nrim_DividendsOnFederalHomeLoanBankStock_019cc4aa-2d61-70f9-9065-ec45b4faea1b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_019cc4aa-2d61-7387-87a1-2d4e6e1dd1d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeDepositsWithFinancialInstitutions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_019cc4aa-2d61-7387-87a1-2d4e6e1dd1d8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2d61-7f3f-9c8a-d1816847c9d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesAbstract_019cc4aa-2d61-70b3-ac76-5934a06aecea" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2d61-7f3f-9c8a-d1816847c9d2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDeposits_019cc4aa-2d61-7d9e-a35b-670cb1264776" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:to="loc_us-gaap_InterestExpenseDeposits_019cc4aa-2d61-7d9e-a35b-670cb1264776" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOtherLongTermDebt_019cc4aa-2d61-7639-be5a-8a8bf5b011cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOtherLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:to="loc_us-gaap_InterestExpenseOtherLongTermDebt_019cc4aa-2d61-7639-be5a-8a8bf5b011cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_019d03a5-0e35-72f0-a93e-c45a3e32ce56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseSubordinatedNotesAndDebentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:to="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_019d03a5-0e35-72f0-a93e-c45a3e32ce56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019cc4aa-2d61-7e68-b25b-4a1170272708" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cc4aa-2d61-7069-bfd3-2fb81f2beb46" xlink:to="loc_us-gaap_InterestExpenseOperating_019cc4aa-2d61-7e68-b25b-4a1170272708" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019cc4aa-2d61-78e8-9a1b-9ddfeb3f8241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019cc4aa-2d61-78e8-9a1b-9ddfeb3f8241" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2d61-795e-bf83-8c9b57bb18c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2d61-795e-bf83-8c9b57bb18c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cc4aa-2d61-7927-9837-814314fa2f4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cc4aa-2d61-7927-9837-814314fa2f4a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2d61-7fea-8b55-f9087035f6b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansConsumer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2d61-7fea-8b55-f9087035f6b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_IncomePurchasedReceivables_019cc4aa-2d61-7fce-96df-9b5ed4145c11" xlink:href="nrim-20260331.xsd#nrim_IncomePurchasedReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_nrim_IncomePurchasedReceivables_019cc4aa-2d61-7fce-96df-9b5ed4145c11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cc4aa-2d61-73c6-8087-4406d384bd0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cc4aa-2d61-73c6-8087-4406d384bd0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019cc4aa-2d61-715c-93f7-ecf83e9e8a46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019cc4aa-2d61-715c-93f7-ecf83e9e8a46" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_019cc4aa-2d61-76b7-93d5-1b0ec98a4ac0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_019cc4aa-2d61-76b7-93d5-1b0ec98a4ac0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_019cc4aa-2d61-76b1-b705-8554e994294e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_019cc4aa-2d61-7dec-8b46-7f26d2f57c25" xlink:to="loc_us-gaap_NoninterestIncome_019cc4aa-2d61-76b1-b705-8554e994294e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2d61-7fd6-b089-985fcf9f0a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2d61-7fd6-b089-985fcf9f0a0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2d61-790a-ab84-eb847a87c1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InformationTechnologyAndDataProcessing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2d61-790a-ab84-eb847a87c1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019cc4aa-2d61-7a5a-a8ac-4038a121126e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OccupancyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_OccupancyNet_019cc4aa-2d61-7a5a-a8ac-4038a121126e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019cc4aa-2d61-726a-a8eb-0d12dbc407cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_ProfessionalFees_019cc4aa-2d61-726a-a8eb-0d12dbc407cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingExpense_019cc4aa-2d61-72e6-905d-a69786b2b14e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_MarketingExpense_019cc4aa-2d61-72e6-905d-a69786b2b14e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2d61-7e4f-839b-c85caa9656ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2d61-7e4f-839b-c85caa9656ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2d61-7366-9652-fcda1667aa59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralInsuranceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2d61-7366-9652-fcda1667aa59" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherRealEstateOwnedExpenseIncomeNetRentalIncomeAndGainsOnSale_019cc4aa-2d61-73a3-a943-8e874bd0a9d1" xlink:href="nrim-20260331.xsd#nrim_OtherRealEstateOwnedExpenseIncomeNetRentalIncomeAndGainsOnSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_nrim_OtherRealEstateOwnedExpenseIncomeNetRentalIncomeAndGainsOnSale_019cc4aa-2d61-73a3-a943-8e874bd0a9d1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoninterestExpense_019cc4aa-2d61-7368-bddc-f9d9421d1bcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_OtherNoninterestExpense_019cc4aa-2d61-7368-bddc-f9d9421d1bcb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019cc4aa-2d61-731e-9672-43e1be0b594b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019cc4aa-2d61-7656-b6f8-10b756aa5703" xlink:to="loc_us-gaap_NoninterestExpense_019cc4aa-2d61-731e-9672-43e1be0b594b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2d61-7207-a5d0-effdfac95ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2d61-7207-a5d0-effdfac95ad8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cc4aa-2d61-7053-80d0-ba1cf28f61dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cc4aa-2d61-7053-80d0-ba1cf28f61dc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cc4aa-2d61-7056-bab2-6f9cef5dd511" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_NetIncomeLoss_019cc4aa-2d61-7056-bab2-6f9cef5dd511" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019cc4aa-2d61-71a3-b382-daaa1a07064c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_EarningsPerShareBasic_019cc4aa-2d61-71a3-b382-daaa1a07064c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019cc4aa-2d61-7ea9-ab95-8b5e81543632" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019cc4aa-2d61-7ea9-ab95-8b5e81543632" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cc4aa-2d61-771d-8b76-00035bcc3f59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cc4aa-2d61-771d-8b76-00035bcc3f59" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cc4aa-2d61-778d-94a2-acc41f21ccf9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7b6e-82f9-67296ee5608a" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cc4aa-2d61-778d-94a2-acc41f21ccf9" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="simple" xlink:href="nrim-20260331.xsd#ConsolidatedStatementsofChangesinShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7e3c-8c8e-bc65f152400d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cc4aa-2d61-709e-bceb-bea38c222032" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7e3c-8c8e-bc65f152400d" xlink:to="loc_us-gaap_StatementTable_019cc4aa-2d61-709e-bceb-bea38c222032" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cc4aa-2d61-7714-b7e0-3a6795d02759" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cc4aa-2d61-709e-bceb-bea38c222032" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cc4aa-2d61-7714-b7e0-3a6795d02759" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-7714-b7e0-3a6795d02759_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cc4aa-2d61-7714-b7e0-3a6795d02759" xlink:to="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-7714-b7e0-3a6795d02759_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cc4aa-2d61-7714-b7e0-3a6795d02759" xlink:to="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cc4aa-2d61-70f4-acff-4428e669429d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:to="loc_us-gaap_CommonStockMember_019cc4aa-2d61-70f4-acff-4428e669429d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cc4aa-2d61-7fee-a048-4e462f2241cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cc4aa-2d61-7fee-a048-4e462f2241cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cc4aa-2d61-7e53-984c-0eb44b020830" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:to="loc_us-gaap_RetainedEarningsMember_019cc4aa-2d61-7e53-984c-0eb44b020830" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cc4aa-2d61-7730-83b4-f78ca92a3ed1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cc4aa-2d61-779a-b8b1-5112984ea450" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cc4aa-2d61-7730-83b4-f78ca92a3ed1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cc4aa-2d61-7e3c-8c8e-bc65f152400d" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019cc4aa-2d61-7e1c-b1a5-5d77d1d6919a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_CommonStockSharesIssued_019cc4aa-2d61-7e1c-b1a5-5d77d1d6919a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cc4aa-2d61-7ac9-9f35-c364ec77b18a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_StockholdersEquity_019cc4aa-2d61-7ac9-9f35-c364ec77b18a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_019cc4aa-2d61-72b6-ba80-1239157a87fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_DividendsCash_019cc4aa-2d61-72b6-ba80-1239157a87fc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cc4aa-2d61-7701-a411-54b067dc69f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cc4aa-2d61-7701-a411-54b067dc69f8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019cc4aa-2d61-7e7c-85b2-3d3a33a21e6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019cc4aa-2d61-7e7c-85b2-3d3a33a21e6e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cc4aa-2d61-77e9-a0ae-f9908e86e64d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cc4aa-2d61-77e9-a0ae-f9908e86e64d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cc4aa-2d61-7326-bd4a-490afccaf175" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cc4aa-2d61-7326-bd4a-490afccaf175" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cc4aa-2d61-70a0-a65a-4360e227c067" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc4aa-2d61-7978-97e0-9154b05dd745" xlink:to="loc_us-gaap_NetIncomeLoss_019cc4aa-2d61-70a0-a65a-4360e227c067" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019cc4aa-2d61-7a77-93a8-1aa4b1b5bcfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cc4aa-2d61-7baa-a5ba-09e77b844e85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/InvestmentSecuritiesSummaryofDebtSecuritiesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#InvestmentSecuritiesSummaryofDebtSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/InvestmentSecuritiesSummaryofDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a1c-a91a-c53148fafce1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a1c-a91a-c53148fafce1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-787b-a8a8-4de66f897157" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a1c-a91a-c53148fafce1" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-787b-a8a8-4de66f897157" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-787b-a8a8-4de66f897157_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-787b-a8a8-4de66f897157" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-787b-a8a8-4de66f897157_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-787b-a8a8-4de66f897157" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9450-546d-7736-a6e3-b489a1453cbd" xlink:href="nrim-20260331.xsd#nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:to="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9450-546d-7736-a6e3-b489a1453cbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d9452-5184-7bdb-a33c-5a78396517b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d9452-5184-7bdb-a33c-5a78396517b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-70e7-a562-fb9fb65bc8da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-70e7-a562-fb9fb65bc8da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7b3a-ae11-638c46d4bd97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7d94-b105-16a6a995a797" xlink:to="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7b3a-ae11-638c46d4bd97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b13-8ab8-2116c6ec5b37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b13-8ab8-2116c6ec5b37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019cc4aa-2d61-7d88-b803-fef101d6f976" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019cc4aa-2d61-7d88-b803-fef101d6f976" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019cc4aa-2d61-7669-88c5-1abbcfe9e4a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019cc4aa-2d61-7669-88c5-1abbcfe9e4a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d61-705a-81f8-a1d70296d33b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d61-705a-81f8-a1d70296d33b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d61-7946-953a-a3082d872c61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7dfd-8b53-573992e47b61" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d61-7946-953a-a3082d872c61" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cc4aa-2d61-794d-9e81-68b89f1a856b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cc4aa-2d61-794d-9e81-68b89f1a856b" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-724c-abd9-a162498fccae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cc4aa-2d61-794d-9e81-68b89f1a856b" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-724c-abd9-a162498fccae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-724c-abd9-a162498fccae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-790a-be3f-5432e103e5a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-72ea-809a-7d1eee90efac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b2d-9c73-b258b1901bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b2d-9c73-b258b1901bf5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_019cc4aa-2d61-7887-95d3-a08fba80e6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_019cc4aa-2d61-7887-95d3-a08fba80e6a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cc4aa-2d61-7eac-a906-f870926a6e1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cc4aa-2d61-7eac-a906-f870926a6e1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d61-795c-8120-26ea2adc43d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2d61-795c-8120-26ea2adc43d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_019cc4aa-2d61-7370-9f93-03eb55f6c7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cc4aa-2d61-7373-a520-2e051d908772" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesFairValue_019cc4aa-2d61-7370-9f93-03eb55f6c7ad" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/InvestmentSecuritiesGrossUnrealizedLossesonAvailableforsaleSecuritiesandtheRelatedFairValueDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#InvestmentSecuritiesGrossUnrealizedLossesonAvailableforsaleSecuritiesandtheRelatedFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/InvestmentSecuritiesGrossUnrealizedLossesonAvailableforsaleSecuritiesandtheRelatedFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-783d-a58e-e8760460ac72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-73ee-8d71-23c105203d30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-783d-a58e-e8760460ac72" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-73ee-8d71-23c105203d30" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-73ee-8d71-23c105203d30" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-755d-8649-a3a1f45fdb9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7f7f-96af-bc7e00b6dc71" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-755d-8649-a3a1f45fdb9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9458-2923-7f9b-9959-d033d3bb3d1e" xlink:href="nrim-20260331.xsd#nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-755d-8649-a3a1f45fdb9e" xlink:to="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9458-2923-7f9b-9959-d033d3bb3d1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-7e14-ab33-380ac16e7c29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-755d-8649-a3a1f45fdb9e" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-7e14-ab33-380ac16e7c29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7be7-9744-18e925dea74a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-755d-8649-a3a1f45fdb9e" xlink:to="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7be7-9744-18e925dea74a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-783d-a58e-e8760460ac72" xlink:to="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019cc4aa-2d61-7b47-8156-b7a81c201b1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019cc4aa-2d61-7b47-8156-b7a81c201b1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cc4aa-2d61-7e36-b429-6a957f96811d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cc4aa-2d61-7e36-b429-6a957f96811d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019cc4aa-2d61-77f8-98b6-a35b0594d584" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019cc4aa-2d61-77f8-98b6-a35b0594d584" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cc4aa-2d61-7ef2-a533-28922a7f68eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cc4aa-2d61-7ef2-a533-28922a7f68eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cc4aa-2d61-76e0-919b-b971e3af2d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cc4aa-2d61-76e0-919b-b971e3af2d1d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cc4aa-2d61-7a62-a84c-fcdd42b7bd7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019cc4aa-2d61-77af-9c92-7f22aeb1fbcb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cc4aa-2d61-7a62-a84c-fcdd42b7bd7f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-783d-a58e-e8760460ac72" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_019cc4aa-2d61-78bc-9802-28009d67bca4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_019cc4aa-2d61-78bc-9802-28009d67bca4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cc4aa-2d61-7506-9e91-434bb5b8d465" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cc4aa-2d61-7506-9e91-434bb5b8d465" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_019cc4aa-2d61-7447-9a60-7407f4ae44a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_019cc4aa-2d61-7447-9a60-7407f4ae44a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cc4aa-2d61-7fbe-b327-f3b3e7db4e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cc4aa-2d61-7fbe-b327-f3b3e7db4e2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_019cc4aa-2d61-7cd2-9946-ec8c259a220b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_019cc4aa-2d61-7cd2-9946-ec8c259a220b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_019cc4aa-2d61-75ed-aca7-72ff44bb5b78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cc4aa-2d61-7c82-88c9-b65ab4081a03" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_019cc4aa-2d61-75ed-aca7-72ff44bb5b78" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/InvestmentSecuritiesScheduleofDebtSecuritiesbyContractualMaturityDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#InvestmentSecuritiesScheduleofDebtSecuritiesbyContractualMaturityDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/InvestmentSecuritiesScheduleofDebtSecuritiesbyContractualMaturityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7965-bd46-dd87c87baf8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a7f-8cec-48aaddbe2092" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7965-bd46-dd87c87baf8c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a7f-8cec-48aaddbe2092" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7235-8284-daf051e7e5c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2d61-7a7f-8cec-48aaddbe2092" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7235-8284-daf051e7e5c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7235-8284-daf051e7e5c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7235-8284-daf051e7e5c9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7235-8284-daf051e7e5c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2d61-7235-8284-daf051e7e5c9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9459-df8f-74be-b766-4cbb2c70c40c" xlink:href="nrim-20260331.xsd#nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:to="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d9459-df8f-74be-b766-4cbb2c70c40c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945a-fcf2-788d-a3f7-0ef8d7971ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945a-fcf2-788d-a3f7-0ef8d7971ac7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-7734-b8af-a9fd41fa41a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2d61-7734-b8af-a9fd41fa41a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7041-b26c-6df887a3c4a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2d61-7364-8366-88cc2c9ba7da" xlink:to="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2d61-7041-b26c-6df887a3c4a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7965-bd46-dd87c87baf8c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_019cc4aa-2d61-7aa2-91ea-1580c34bf091" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_019cc4aa-2d61-7aa2-91ea-1580c34bf091" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_019cc4aa-2d61-76b2-9bd5-1f00d4efa7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_019cc4aa-2d61-76b2-9bd5-1f00d4efa7eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_019cc4aa-2d61-7aa7-a7bc-ca9055ccafb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_019cc4aa-2d61-7aa7-a7bc-ca9055ccafb4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_019cc4aa-2d61-7064-bab9-93c874e8b7af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_019cc4aa-2d61-7064-bab9-93c874e8b7af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b4e-9f75-8f2282a4654d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2d61-7b4e-9f75-8f2282a4654d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost_019cc4aa-2d61-71d2-9cc1-3ee48f6b9439" xlink:href="nrim-20260331.xsd#nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost_019cc4aa-2d61-71d2-9cc1-3ee48f6b9439" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsAmortizedCost_019cc4aa-2d61-78f2-9b0f-b15b5612120a" xlink:href="nrim-20260331.xsd#nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsAmortizedCost_019cc4aa-2d61-78f2-9b0f-b15b5612120a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss_019cc4aa-2d61-73e9-9eb2-648bded49e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract_019cc4aa-2d61-72a5-99b3-0997bed5825f" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss_019cc4aa-2d61-73e9-9eb2-648bded49e3e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2d61-7965-bd46-dd87c87baf8c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_019cc4aa-2d61-72d9-bf1c-abd8e61a486d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_019cc4aa-2d61-72d9-bf1c-abd8e61a486d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_019cc4aa-2d61-7b28-9c9c-2ec18be5ea19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_019cc4aa-2d61-7b28-9c9c-2ec18be5ea19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_019cc4aa-2d61-7eff-924c-ff8f9a7c02cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_019cc4aa-2d61-7eff-924c-ff8f9a7c02cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019cc4aa-2d61-7a78-84b3-351101a98b04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019cc4aa-2d61-7a78-84b3-351101a98b04" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d61-7883-a217-0ab4986fa777" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2d61-7883-a217-0ab4986fa777" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue_019cc4aa-2d61-7bf0-852e-233fbec194c7" xlink:href="nrim-20260331.xsd#nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue_019cc4aa-2d61-7bf0-852e-233fbec194c7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsFairValue_019cc4aa-2d61-7a2d-8293-a990ff772847" xlink:href="nrim-20260331.xsd#nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_nrim_DebtSecuritiesAvailableForSaleAndHeldToMaturityMaturityAllocatedAndSingleMaturityDateRollingAfterFiveThroughTenYearsFairValue_019cc4aa-2d61-7a2d-8293-a990ff772847" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue_019cc4aa-2e29-7c7f-a4cc-db7bcc5c83de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_019cc4aa-2d61-7b7b-a07a-d5755cd9f2a9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue_019cc4aa-2e29-7c7f-a4cc-db7bcc5c83de" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/InvestmentSecuritiesSummaryofInterestIncomeonAvailableforSaleInvestmentSecuritiesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#InvestmentSecuritiesSummaryofInterestIncomeonAvailableforSaleInvestmentSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/InvestmentSecuritiesSummaryofInterestIncomeonAvailableforSaleInvestmentSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2e29-7ea1-a375-7bdecc9bf952" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2e29-7c61-b757-4664361427a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2e29-7ea1-a375-7bdecc9bf952" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2e29-7c61-b757-4664361427a6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cc4aa-2e29-7c61-b757-4664361427a6" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-790b-ac31-283e23bd1da7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77be-bf3b-9fdf46e8b2e8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-790b-ac31-283e23bd1da7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d945d-c07e-7816-ac70-ac5b9acd2d4d" xlink:href="nrim-20260331.xsd#nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-790b-ac31-283e23bd1da7" xlink:to="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019d945d-c07e-7816-ac70-ac5b9acd2d4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945d-fe7c-72bb-9615-5809862a5d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-790b-ac31-283e23bd1da7" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945d-fe7c-72bb-9615-5809862a5d4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherInvestmentSecuritiesMember_019cc4aa-2e29-73b5-a148-cc34454ad34e" xlink:href="nrim-20260331.xsd#nrim_OtherInvestmentSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-790b-ac31-283e23bd1da7" xlink:to="loc_nrim_OtherInvestmentSecuritiesMember_019cc4aa-2e29-73b5-a148-cc34454ad34e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxable_019cc4aa-2e29-712e-9080-ef03cc74cd53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeSecuritiesTaxable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2e29-7ea1-a375-7bdecc9bf952" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxable_019cc4aa-2e29-712e-9080-ef03cc74cd53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_019cc4aa-2e29-765b-908d-a69ab5d68f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeSecuritiesTaxExempt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2e29-7ea1-a375-7bdecc9bf952" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_019cc4aa-2e29-765b-908d-a69ab5d68f3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecurities_019cc4aa-2e29-7da0-86d7-6179e154856a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cc4aa-2e29-7ea1-a375-7bdecc9bf952" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecurities_019cc4aa-2e29-7da0-86d7-6179e154856a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAmortizedCostandUnpaidPrincipalofLoansDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesAmortizedCostandUnpaidPrincipalofLoansDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAmortizedCostandUnpaidPrincipalofLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7aea-8013-cc59068cd8e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7aea-8013-cc59068cd8e6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7df8-8393-c1b2dc879a6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7aea-8013-cc59068cd8e6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7df8-8393-c1b2dc879a6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7df8-8393-c1b2dc879a6f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7df8-8393-c1b2dc879a6f" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7df8-8393-c1b2dc879a6f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7df8-8393-c1b2dc879a6f" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7ac5-9deb-c4182e9be6ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7ac5-9deb-c4182e9be6ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7d76-b347-e6fa8cca21f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7d76-b347-e6fa8cca21f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-736f-941d-3ef503878f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-736f-941d-3ef503878f0e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-71fa-a37d-ef8a9145e1c4" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-71fa-a37d-ef8a9145e1c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-70f5-9da9-154ce2802e4a" xlink:href="nrim-20260331.xsd#nrim_GovernmentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-70f5-9da9-154ce2802e4a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-71b4-8121-b98ebf4d7717" xlink:href="nrim-20260331.xsd#nrim_AgriculturalProductionPorfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-71b4-8121-b98ebf4d7717" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7ea1-88bd-280f4089f4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7ea1-88bd-280f4089f4b8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-76c3-8ecb-9488c1a4436a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnallocatedFinancingReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7007-aba4-0c394bb8b99b" xlink:to="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-76c3-8ecb-9488c1a4436a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-757d-8a73-4233b03a97db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7aea-8013-cc59068cd8e6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-757d-8a73-4233b03a97db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-757d-8a73-4233b03a97db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-757d-8a73-4233b03a97db" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-757d-8a73-4233b03a97db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-757d-8a73-4233b03a97db" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7201-837c-0ab95b439b02" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7201-837c-0ab95b439b02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-73ba-9038-2631ab2a1ae6" xlink:href="nrim-20260331.xsd#nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:to="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-73ba-9038-2631ab2a1ae6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7d0b-9fda-ee6b801b87d9" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:to="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7d0b-9fda-ee6b801b87d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7f86-96a0-9aaf8a692511" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7f86-96a0-9aaf8a692511" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7dd6-b904-c350b05f1fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ed4-a279-90e04aaad951" xlink:to="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7dd6-b904-c350b05f1fd3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7c2c-bd8b-684eb717a923" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7c2c-bd8b-684eb717a923" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2e29-721e-af2c-0bcb60e548ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2e29-721e-af2c-0bcb60e548ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2e29-757f-a329-44050da5549c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2e29-757f-a329-44050da5549c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_019cc4aa-2e29-74e0-874b-49e139dbcc0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_019cc4aa-2e29-74e0-874b-49e139dbcc0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount_019cc4aa-2e29-7171-8c9b-60f0538f06ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7193-a75e-769fa6f6a830" xlink:to="loc_us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount_019cc4aa-2e29-7171-8c9b-60f0538f06ef" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7362-acc1-0acbcfe53ad2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7362-acc1-0acbcfe53ad2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7c8a-b405-c9d01630ea56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7362-acc1-0acbcfe53ad2" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7c8a-b405-c9d01630ea56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7c8a-b405-c9d01630ea56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7c8a-b405-c9d01630ea56" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7c8a-b405-c9d01630ea56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7448-ab5e-2f437501e732" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7c8a-b405-c9d01630ea56" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7448-ab5e-2f437501e732" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-7c1c-b383-0b102fb11665" xlink:href="nrim-20260331.xsd#nrim_ExcludingUSGovernmentAgencyInsuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7448-ab5e-2f437501e732" xlink:to="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-7c1c-b383-0b102fb11665" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-778c-b8ae-a2f4cbd58077" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7362-acc1-0acbcfe53ad2" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-778c-b8ae-a2f4cbd58077" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-778c-b8ae-a2f4cbd58077_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-778c-b8ae-a2f4cbd58077" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-778c-b8ae-a2f4cbd58077_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-77e6-abb0-ad29201a9052" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-778c-b8ae-a2f4cbd58077" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-77e6-abb0-ad29201a9052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-7c09-8310-56eb5645975a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-77e6-abb0-ad29201a9052" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-7c09-8310-56eb5645975a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableUnamortizedLoanFeeCost_019cc4aa-2e29-7bfd-a32e-c8c5452182af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableUnamortizedLoanFeeCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_FinancingReceivableUnamortizedLoanFeeCost_019cc4aa-2e29-7bfd-a32e-c8c5452182af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2e29-7d42-beed-5f2f068dc56a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss_019cc4aa-2e29-7d42-beed-5f2f068dc56a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cc4aa-2e29-7a7d-add7-8c760ce3ac4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cc4aa-2e29-7a7d-add7-8c760ce3ac4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAccruedInterestWriteoff_019cc4aa-2e29-74df-97d0-5a4b69bc242b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAccruedInterestWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_FinancingReceivableAccruedInterestWriteoff_019cc4aa-2e29-74df-97d0-5a4b69bc242b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_019cc4aa-2e29-75c5-b50d-5ced70cf31c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableNonaccrualInterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_019cc4aa-2e29-75c5-b50d-5ced70cf31c1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FinancingReceivableExcludingAccruedInterestModifiedOutstandingCommitments_019cc4aa-2e29-7411-a78b-15af91448037" xlink:href="nrim-20260331.xsd#nrim_FinancingReceivableExcludingAccruedInterestModifiedOutstandingCommitments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7f8d-8457-a680cdde6499" xlink:to="loc_nrim_FinancingReceivableExcludingAccruedInterestModifiedOutstandingCommitments_019cc4aa-2e29-7411-a78b-15af91448037" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesActivityinACLRelatedtoLoansHeldforInvestmentDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesActivityinACLRelatedtoLoansHeldforInvestmentDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesActivityinACLRelatedtoLoansHeldforInvestmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-705c-8540-884fd6dcc1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-73ec-9d23-84768f02511a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-705c-8540-884fd6dcc1b4" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-73ec-9d23-84768f02511a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-79bf-b7f5-d4971058f3f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-73ec-9d23-84768f02511a" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-79bf-b7f5-d4971058f3f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79bf-b7f5-d4971058f3f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-79bf-b7f5-d4971058f3f6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79bf-b7f5-d4971058f3f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-79bf-b7f5-d4971058f3f6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-728e-9d28-4e92414dafd4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-728e-9d28-4e92414dafd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7caa-a8b9-e61bac62951f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7caa-a8b9-e61bac62951f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-7b18-a23d-b992aac523e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-7b18-a23d-b992aac523e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7ed0-899a-f0b8c69ce3c4" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7ed0-899a-f0b8c69ce3c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-72ae-a43d-768ba20116f0" xlink:href="nrim-20260331.xsd#nrim_GovernmentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-72ae-a43d-768ba20116f0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-7215-9b88-625e0e07772f" xlink:href="nrim-20260331.xsd#nrim_AgriculturalProductionPorfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-7215-9b88-625e0e07772f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-76f0-be65-86a99601de2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-76f0-be65-86a99601de2a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-7d4c-b685-907dee61b036" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnallocatedFinancingReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7474-a622-08859f09f8b1" xlink:to="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-7d4c-b685-907dee61b036" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-736f-9b84-50c89736322d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-73ec-9d23-84768f02511a" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-736f-9b84-50c89736322d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-736f-9b84-50c89736322d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-736f-9b84-50c89736322d" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-736f-9b84-50c89736322d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-736f-9b84-50c89736322d" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-74a4-a965-8a669bc01168" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-74a4-a965-8a669bc01168" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-706e-a33c-2921d30deb7b" xlink:href="nrim-20260331.xsd#nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:to="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-706e-a33c-2921d30deb7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-750e-a85d-e63b54474baa" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:to="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-750e-a85d-e63b54474baa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7f43-bee0-5bd8d12b93d5" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7f43-bee0-5bd8d12b93d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7d6f-b6be-8a3b944511e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7474-85ee-f50ba4f2e808" xlink:to="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7d6f-b6be-8a3b944511e3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-705c-8540-884fd6dcc1b4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2e29-71e3-b9b3-788170497618" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2e29-71e3-b9b3-788170497618" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cc4aa-2e29-774d-a1ba-5eb991b1bdcd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cc4aa-2e29-774d-a1ba-5eb991b1bdcd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cc4aa-2e29-7503-b80f-64ebcc23355a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cc4aa-2e29-7503-b80f-64ebcc23355a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019cc4aa-2e29-7481-b345-bfcd7069c01c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019cc4aa-2e29-7922-a031-d34c67bba56f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019cc4aa-2e29-7481-b345-bfcd7069c01c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cc4aa-2e29-719f-996b-e9e01a4f7c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesScheduleofGrossChargeOffsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesScheduleofGrossChargeOffsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesScheduleofGrossChargeOffsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-7edf-9e1f-d303334dcbdb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-7edf-9e1f-d303334dcbdb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7edb-bffd-3f4c9791bf54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-7edf-9e1f-d303334dcbdb" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7edb-bffd-3f4c9791bf54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7edb-bffd-3f4c9791bf54_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7edb-bffd-3f4c9791bf54" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7edb-bffd-3f4c9791bf54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7817-8cb7-2feccc0a5edd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7edb-bffd-3f4c9791bf54" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7817-8cb7-2feccc0a5edd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-72d1-a202-9b150a971e44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7817-8cb7-2feccc0a5edd" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-72d1-a202-9b150a971e44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7adf-b010-4dff701829d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7817-8cb7-2feccc0a5edd" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7adf-b010-4dff701829d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_019cc4aa-2e29-7951-a9c6-15709c5719c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_019cc4aa-2e29-7951-a9c6-15709c5719c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-75ef-8d9e-20cc9eff8bce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-75ef-8d9e-20cc9eff8bce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-7fe2-891e-cb9bd224fa1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-7fe2-891e-cb9bd224fa1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-72f0-a07c-62cf8c7e1cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-72f0-a07c-62cf8c7e1cbf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-77c5-8a43-0dfd4b6a5f85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-77c5-8a43-0dfd4b6a5f85" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-799e-a3b9-57601c76be1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_019cc4aa-2e29-799e-a3b9-57601c76be1d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cc4aa-2e29-73ae-9467-04e535513cb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7f86-90bd-8c2ee3c676bf" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cc4aa-2e29-73ae-9467-04e535513cb1" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesPortfolioofRiskratedLoansbyGradeandbyYearofOriginationDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesPortfolioofRiskratedLoansbyGradeandbyYearofOriginationDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesPortfolioofRiskratedLoansbyGradeandbyYearofOriginationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7372-99e4-96ee15273df0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7372-99e4-96ee15273df0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7372-99e4-96ee15273df0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7372-99e4-96ee15273df0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7372-99e4-96ee15273df0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7372-99e4-96ee15273df0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7cec-9f98-97716883d456" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7cec-9f98-97716883d456" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7633-bdb1-1682f0241e88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7633-bdb1-1682f0241e88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-704c-ad85-82524c0986cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-704c-ad85-82524c0986cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7f67-ba82-6632631aba2e" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7f67-ba82-6632631aba2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-7039-b464-b065d3e2bd62" xlink:href="nrim-20260331.xsd#nrim_GovernmentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-7039-b464-b065d3e2bd62" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-74c7-817d-9eb3c8bccdac" xlink:href="nrim-20260331.xsd#nrim_AgriculturalProductionPorfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-74c7-817d-9eb3c8bccdac" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-724a-a07c-ea9dfbd47c55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-724a-a07c-ea9dfbd47c55" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-719c-bf7d-538e439d55f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnallocatedFinancingReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-79c5-9079-4c403ddcac9e" xlink:to="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-719c-bf7d-538e439d55f6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-70ed-a1f9-d342bdd0525c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-70ed-a1f9-d342bdd0525c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-70ed-a1f9-d342bdd0525c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-70ed-a1f9-d342bdd0525c" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-70ed-a1f9-d342bdd0525c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-70ed-a1f9-d342bdd0525c" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-765e-a0a5-0fc8f4855110" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-765e-a0a5-0fc8f4855110" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-7ab8-b5ea-2e8740cbbfb8" xlink:href="nrim-20260331.xsd#nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:to="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-7ab8-b5ea-2e8740cbbfb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-71b1-bafa-237f71d1c8f5" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:to="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-71b1-bafa-237f71d1c8f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7fd5-9539-1bc237430df1" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7fd5-9539-1bc237430df1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7f11-bc77-c3270c5d9169" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78cc-a164-8c46daf5518d" xlink:to="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7f11-bc77-c3270c5d9169" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_019cc4aa-2e29-79a0-91c7-a548fc845f36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_019cc4aa-2e29-79a0-91c7-a548fc845f36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-79a0-91c7-a548fc845f36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019cc4aa-2e29-79a0-91c7-a548fc845f36" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-79a0-91c7-a548fc845f36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-73c2-a888-11483050908e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019cc4aa-2e29-79a0-91c7-a548fc845f36" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-73c2-a888-11483050908e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassMember_019cc4aa-2e29-706c-ae56-f8d97f232296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PassMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-73c2-a888-11483050908e" xlink:to="loc_us-gaap_PassMember_019cc4aa-2e29-706c-ae56-f8d97f232296" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CriticizedMember_019cc4aa-2e29-7aa7-8704-59c3febfb04d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CriticizedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cc4aa-2e29-73c2-a888-11483050908e" xlink:to="loc_us-gaap_CriticizedMember_019cc4aa-2e29-7aa7-8704-59c3febfb04d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cc4aa-2e29-7c44-81a8-47867ef24ae5" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7688-a95d-e6c1dce506ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-7fa9-8fa3-9ca27358a4ef" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7688-a95d-e6c1dce506ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UsGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-773f-9893-3eb1835746ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UsGovernmentAgencyInsuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7688-a95d-e6c1dce506ac" xlink:to="loc_us-gaap_UsGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-773f-9893-3eb1835746ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-7a4f-a969-7999dc3485fd" xlink:href="nrim-20260331.xsd#nrim_ExcludingUSGovernmentAgencyInsuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7688-a95d-e6c1dce506ac" xlink:to="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-7a4f-a969-7999dc3485fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019cc4aa-2e29-70ed-9915-92ec2c1614ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019cc4aa-2e29-70ed-9915-92ec2c1614ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019cc4aa-2e29-7460-bcb1-004650e885b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019cc4aa-2e29-7460-bcb1-004650e885b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_019cc4aa-2e29-75f4-ad16-a8fcbbebc1a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_019cc4aa-2e29-75f4-ad16-a8fcbbebc1a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_019cc4aa-2e29-713c-9774-91d1c1e75753" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_019cc4aa-2e29-713c-9774-91d1c1e75753" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_019cc4aa-2e29-7ecd-8a16-911671fa5b47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_019cc4aa-2e29-7ecd-8a16-911671fa5b47" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_019cc4aa-2e29-733b-bf4d-ef2666320773" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_019cc4aa-2e29-733b-bf4d-ef2666320773" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7f9c-89f4-3fe4ef83acfd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cc4aa-2e29-7bde-8fe3-9916af947017" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7f9c-89f4-3fe4ef83acfd" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAgingofContractuallyPastDueLoansDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesAgingofContractuallyPastDueLoansDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAgingofContractuallyPastDueLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cc4aa-2e29-742e-ace0-1ae16f36a7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cc4aa-2e29-7c5c-82c5-e3f6bd9a7fa4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cc4aa-2e29-742e-ace0-1ae16f36a7d8" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cc4aa-2e29-7c5c-82c5-e3f6bd9a7fa4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7161-ae67-965884e369d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cc4aa-2e29-7c5c-82c5-e3f6bd9a7fa4" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7161-ae67-965884e369d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7161-ae67-965884e369d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7161-ae67-965884e369d6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7161-ae67-965884e369d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7161-ae67-965884e369d6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-74de-9e79-096f2f6ba34b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-74de-9e79-096f2f6ba34b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-76aa-a303-722d66ee8a52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-76aa-a303-722d66ee8a52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-7977-ae6c-91cff69e2099" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-7977-ae6c-91cff69e2099" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-70ce-b8a5-90cb61477543" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-70ce-b8a5-90cb61477543" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-7acd-8597-d558e7396a26" xlink:href="nrim-20260331.xsd#nrim_GovernmentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_nrim_GovernmentPortfolioSegmentMember_019cc4aa-2e29-7acd-8597-d558e7396a26" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-7239-aa45-9d0e8b686478" xlink:href="nrim-20260331.xsd#nrim_AgriculturalProductionPorfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_nrim_AgriculturalProductionPorfolioSegmentMember_019cc4aa-2e29-7239-aa45-9d0e8b686478" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7a14-a1c9-328d9d36bc2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cc4aa-2e29-7a14-a1c9-328d9d36bc2d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-73cc-8638-3692257b0ec0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnallocatedFinancingReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e35-9c8b-c8820b842603" xlink:to="loc_us-gaap_UnallocatedFinancingReceivablesMember_019cc4aa-2e29-73cc-8638-3692257b0ec0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-74fe-8df2-383041201fe5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cc4aa-2e29-7c5c-82c5-e3f6bd9a7fa4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-74fe-8df2-383041201fe5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74fe-8df2-383041201fe5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-74fe-8df2-383041201fe5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74fe-8df2-383041201fe5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-74fe-8df2-383041201fe5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7268-9a61-1189b3ce9192" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7268-9a61-1189b3ce9192" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-7d45-80b7-2d021fb06ae6" xlink:href="nrim-20260331.xsd#nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:to="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019cc4aa-2e29-7d45-80b7-2d021fb06ae6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7209-a994-df4eb29b8233" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:to="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7209-a994-df4eb29b8233" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7fe3-a78c-d67a76c860b9" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7fe3-a78c-d67a76c860b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7e69-8256-c8ddcc1757a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7742-9091-b4a7c441eaef" xlink:to="loc_us-gaap_ConstructionLoansMember_019cc4aa-2e29-7e69-8256-c8ddcc1757a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-7046-8346-85f5342227ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cc4aa-2e29-7c5c-82c5-e3f6bd9a7fa4" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-7046-8346-85f5342227ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7046-8346-85f5342227ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-7046-8346-85f5342227ac" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7046-8346-85f5342227ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7912-a1a1-8b9254854674" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-7046-8346-85f5342227ac" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7912-a1a1-8b9254854674" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75ea-b676-8a4a23d94cb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7912-a1a1-8b9254854674" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75ea-b676-8a4a23d94cb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_019cc4aa-2e29-7996-bbea-82baa8eafc6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75ea-b676-8a4a23d94cb8" xlink:to="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_019cc4aa-2e29-7996-bbea-82baa8eafc6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_019cc4aa-2e29-7382-883c-2878763dec9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75ea-b676-8a4a23d94cb8" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_019cc4aa-2e29-7382-883c-2878763dec9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cc4aa-2e29-7145-b1d9-b565980da725" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75ea-b676-8a4a23d94cb8" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cc4aa-2e29-7145-b1d9-b565980da725" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_019cc4aa-2e29-709b-b44c-9fc0e1560277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7912-a1a1-8b9254854674" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_019cc4aa-2e29-709b-b44c-9fc0e1560277" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-74cc-b036-2d032cfecbd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cc4aa-2e29-742e-ace0-1ae16f36a7d8" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-74cc-b036-2d032cfecbd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing_019cc4aa-2e29-708d-9394-8b1e4f1bae97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cc4aa-2e29-742e-ace0-1ae16f36a7d8" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing_019cc4aa-2e29-708d-9394-8b1e4f1bae97" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesLoansonNonaccrualStatusDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesLoansonNonaccrualStatusDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesLoansonNonaccrualStatusDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableNonaccrualStatusLineItems_019cc4aa-2e29-7c61-922c-a26e5e407265" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableNonaccrualStatusLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableNonaccrualTable_019cc4aa-2e29-7af2-88ad-68f5b594eded" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableNonaccrualTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualStatusLineItems_019cc4aa-2e29-7c61-922c-a26e5e407265" xlink:to="loc_us-gaap_FinancingReceivableNonaccrualTable_019cc4aa-2e29-7af2-88ad-68f5b594eded" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-770f-83eb-758280d08a59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualTable_019cc4aa-2e29-7af2-88ad-68f5b594eded" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-770f-83eb-758280d08a59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-770f-83eb-758280d08a59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-770f-83eb-758280d08a59" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-770f-83eb-758280d08a59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-770f-83eb-758280d08a59" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7a66-b467-5f23d4b2ade2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7a66-b467-5f23d4b2ade2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-79d5-95d6-ae9099cc2a7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-79d5-95d6-ae9099cc2a7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-78bc-b96a-3a16ec6f2f21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-78bc-b96a-3a16ec6f2f21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-738e-a058-f02bcfad96ad" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7db3-954c-bc51347d48bb" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-738e-a058-f02bcfad96ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7342-abb3-6e07116940a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualTable_019cc4aa-2e29-7af2-88ad-68f5b594eded" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7342-abb3-6e07116940a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7342-abb3-6e07116940a3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7342-abb3-6e07116940a3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7342-abb3-6e07116940a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7342-abb3-6e07116940a3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7019-b945-a1ef96f39407" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7019-b945-a1ef96f39407" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019d9483-847d-7922-809a-834506003663" xlink:href="nrim-20260331.xsd#nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:to="loc_nrim_NonOwnerOccupiedAndMultifamilyPropertiesMember_019d9483-847d-7922-809a-834506003663" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7265-be89-2b4d0c36960e" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:to="loc_nrim_PropertiesSecuredByFirstLiensMember_019cc4aa-2e29-7265-be89-2b4d0c36960e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-76b9-99ae-7acbff0641f8" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-745f-89eb-7bd90cff5746" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-76b9-99ae-7acbff0641f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-70c7-a1c4-0667e3dcd697" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualTable_019cc4aa-2e29-7af2-88ad-68f5b594eded" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-70c7-a1c4-0667e3dcd697" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-70c7-a1c4-0667e3dcd697_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-70c7-a1c4-0667e3dcd697" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-70c7-a1c4-0667e3dcd697_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7527-afee-9bb57395cbfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc4aa-2e29-70c7-a1c4-0667e3dcd697" xlink:to="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7527-afee-9bb57395cbfa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UsGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-73c0-9ebe-ef128436877c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UsGovernmentAgencyInsuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7527-afee-9bb57395cbfa" xlink:to="loc_us-gaap_UsGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-73c0-9ebe-ef128436877c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-74b9-b4d3-7e835d43c836" xlink:href="nrim-20260331.xsd#nrim_ExcludingUSGovernmentAgencyInsuredLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc4aa-2e29-7527-afee-9bb57395cbfa" xlink:to="loc_nrim_ExcludingUSGovernmentAgencyInsuredLoansMember_019cc4aa-2e29-74b9-b4d3-7e835d43c836" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cc4aa-2e29-75ee-82af-d7bc18bcdba7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualStatusLineItems_019cc4aa-2e29-7c61-922c-a26e5e407265" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cc4aa-2e29-75ee-82af-d7bc18bcdba7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance_019cc4aa-2e29-7823-aa5d-2b57d72e3494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualStatusLineItems_019cc4aa-2e29-7c61-922c-a26e5e407265" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance_019cc4aa-2e29-7823-aa5d-2b57d72e3494" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FinancingReceivableExcludingAccruedInterestNonaccrualAllowanceForCreditLoss_019d9485-21d6-7103-b795-2ccb1927f6eb" xlink:href="nrim-20260331.xsd#nrim_FinancingReceivableExcludingAccruedInterestNonaccrualAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableNonaccrualStatusLineItems_019cc4aa-2e29-7c61-922c-a26e5e407265" xlink:to="loc_nrim_FinancingReceivableExcludingAccruedInterestNonaccrualAllowanceForCreditLoss_019d9485-21d6-7103-b795-2ccb1927f6eb" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesModificationsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesModificationsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesModificationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModificationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cc4aa-2e29-79b7-a5d0-aec7c546b242" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cc4aa-2e29-79b7-a5d0-aec7c546b242" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cc4aa-2e29-79b7-a5d0-aec7c546b242" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7b8e-9c4f-cab7bdb0756e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7789-b6c2-a39ee470dfa1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7789-b6c2-a39ee470dfa1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7b8d-9022-23993da5b9db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7b8d-9022-23993da5b9db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-78ec-a4c0-b517330f2ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-78ec-a4c0-b517330f2ab9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cff3a-e9ff-7479-80bb-46150b8217c6" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7a80-bf4c-6ac8a136baea" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cff3a-e9ff-7479-80bb-46150b8217c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cc4aa-2e29-79b7-a5d0-aec7c546b242" xlink:to="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-769f-a0b4-2a5b3f3140e5" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtendedMaturityMember_019cc4aa-2e29-7a52-94ed-14fc838648c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExtendedMaturityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:to="loc_us-gaap_ExtendedMaturityMember_019cc4aa-2e29-7a52-94ed-14fc838648c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentDeferralMember_019cc4aa-2e29-71ed-9374-eab48220b39f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:to="loc_us-gaap_PaymentDeferralMember_019cc4aa-2e29-71ed-9374-eab48220b39f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PaymentDeferralAndExtendedMaturityMember_019cc4aa-2e29-7e1b-8107-1aec1466f1b4" xlink:href="nrim-20260331.xsd#nrim_PaymentDeferralAndExtendedMaturityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:to="loc_nrim_PaymentDeferralAndExtendedMaturityMember_019cc4aa-2e29-7e1b-8107-1aec1466f1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalForgivenessMember_019cc4aa-2e29-74b0-ae4c-bd693531220a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrincipalForgivenessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7759-bb6f-1aca2b25a6c4" xlink:to="loc_us-gaap_PrincipalForgivenessMember_019cc4aa-2e29-74b0-ae4c-bd693531220a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7c21-a692-586448d29c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cc4aa-2e29-79b7-a5d0-aec7c546b242" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7c21-a692-586448d29c7e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7c21-a692-586448d29c7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7c21-a692-586448d29c7e" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7c21-a692-586448d29c7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7b6b-919c-5e0ae24007ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7c21-a692-586448d29c7e" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7b6b-919c-5e0ae24007ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7ae0-8b28-14aa79aa0096" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7b6b-919c-5e0ae24007ea" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-7ae0-8b28-14aa79aa0096" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-765e-9c85-5ff3dcea245a" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7b6b-919c-5e0ae24007ea" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-765e-9c85-5ff3dcea245a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cff3a-e9ff-7067-8451-0867619ca694" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7b6b-919c-5e0ae24007ea" xlink:to="loc_us-gaap_ConstructionLoansMember_019cff3a-e9ff-7067-8451-0867619ca694" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cc4aa-2e29-70aa-a257-98f66cab5ac9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cc4aa-2e29-70aa-a257-98f66cab5ac9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent_019cc4aa-2e29-7531-9e0c-3ef206d076ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent_019cc4aa-2e29-7531-9e0c-3ef206d076ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification_019cc4aa-2e29-7fde-b7e4-777b8f6b17f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification_019cc4aa-2e29-7fde-b7e4-777b8f6b17f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification_019cc4aa-2e29-79d0-8c07-b882b0fefb2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification_019cc4aa-2e29-79d0-8c07-b882b0fefb2c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated_019cff3a-e9ff-7629-b0fe-5f5d51f63c26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cc4aa-2e29-7d35-a741-d1076ab504a6" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated_019cff3a-e9ff-7629-b0fe-5f5d51f63c26" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAmortizedCostBasisofLoansDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesAmortizedCostBasisofLoansDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesAmortizedCostBasisofLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7d59-9e18-93a7aa95ea3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-720e-befb-09c8649676f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7d59-9e18-93a7aa95ea3c" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-720e-befb-09c8649676f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-79cf-abbd-3d61e2a028bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-720e-befb-09c8649676f4" xlink:to="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-79cf-abbd-3d61e2a028bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-79cf-abbd-3d61e2a028bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-79cf-abbd-3d61e2a028bd" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-79cf-abbd-3d61e2a028bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7650-8d38-19bd08280ac1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cc4aa-2e29-79cf-abbd-3d61e2a028bd" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7650-8d38-19bd08280ac1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtendedMaturityMember_019cc4aa-2e29-7283-879c-8530ffc08f64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExtendedMaturityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7650-8d38-19bd08280ac1" xlink:to="loc_us-gaap_ExtendedMaturityMember_019cc4aa-2e29-7283-879c-8530ffc08f64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PaymentDeferralAndExtendedMaturityMember_019cc4aa-2e29-7f02-a9ac-55d65e7dad0c" xlink:href="nrim-20260331.xsd#nrim_PaymentDeferralAndExtendedMaturityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cc4aa-2e29-7650-8d38-19bd08280ac1" xlink:to="loc_nrim_PaymentDeferralAndExtendedMaturityMember_019cc4aa-2e29-7f02-a9ac-55d65e7dad0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7629-9509-5d82268c42b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-720e-befb-09c8649676f4" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7629-9509-5d82268c42b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7629-9509-5d82268c42b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7629-9509-5d82268c42b0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7629-9509-5d82268c42b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7446-80ce-dcd63d2e3155" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7629-9509-5d82268c42b0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7446-80ce-dcd63d2e3155" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7bfb-8a84-2aed6907ed89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7446-80ce-dcd63d2e3155" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7bfb-8a84-2aed6907ed89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-70a9-9186-671c3d919faf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7446-80ce-dcd63d2e3155" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-70a9-9186-671c3d919faf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7104-8844-9d11bda07eba" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7446-80ce-dcd63d2e3155" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-7104-8844-9d11bda07eba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-78df-8d53-d0604297a2f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-720e-befb-09c8649676f4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-78df-8d53-d0604297a2f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78df-8d53-d0604297a2f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-78df-8d53-d0604297a2f8" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-78df-8d53-d0604297a2f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7812-ad62-3e0274632c13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-78df-8d53-d0604297a2f8" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7812-ad62-3e0274632c13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-774b-98a4-3e44c4b4e7fd" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7812-ad62-3e0274632c13" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-774b-98a4-3e44c4b4e7fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7cea-ab8a-de67204618c7" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7812-ad62-3e0274632c13" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-7cea-ab8a-de67204618c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPast12Months_019d948c-464a-770f-8f83-fab76b4c9887" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPast12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-7d59-9e18-93a7aa95ea3c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPast12Months_019d948c-464a-770f-8f83-fab76b4c9887" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LoansandAllowanceforCreditLossesPaymentPerformancePastDueDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LoansandAllowanceforCreditLossesPaymentPerformancePastDueDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LoansandAllowanceforCreditLossesPaymentPerformancePastDueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-78bf-9f43-3750f626c278" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-79c5-b781-360f942273c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-78bf-9f43-3750f626c278" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-79c5-b781-360f942273c4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7e8d-a733-70f4e144ff7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-79c5-b781-360f942273c4" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7e8d-a733-70f4e144ff7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e8d-a733-70f4e144ff7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7e8d-a733-70f4e144ff7e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-7e8d-a733-70f4e144ff7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc4aa-2e29-7e8d-a733-70f4e144ff7e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7120-a130-ab140fe0ce67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cc4aa-2e29-7120-a130-ab140fe0ce67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7999-823a-b074e22afe5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cc4aa-2e29-7999-823a-b074e22afe5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-79ef-a1f7-9c8706c2fe22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_019cc4aa-2e29-79ef-a1f7-9c8706c2fe22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-791f-b308-b1b4ddb7e3b2" xlink:href="nrim-20260331.xsd#nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc4aa-2e29-75e5-b1f0-5e917e04e1f6" xlink:to="loc_nrim_OtherConstructionLandDevelopmentAndRawLandLoansPortfolioSegmentMember_019cc4aa-2e29-791f-b308-b1b4ddb7e3b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-78bf-9c85-635da1b8238f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-79c5-b781-360f942273c4" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-78bf-9c85-635da1b8238f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-78bf-9c85-635da1b8238f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-78bf-9c85-635da1b8238f" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-78bf-9c85-635da1b8238f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7237-82e9-7478f19263d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc4aa-2e29-78bf-9c85-635da1b8238f" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7237-82e9-7478f19263d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75e3-b770-c9fdd80004b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7237-82e9-7478f19263d4" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75e3-b770-c9fdd80004b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_019cc4aa-2e29-7320-ba34-a22d3bbe2e17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75e3-b770-c9fdd80004b5" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_019cc4aa-2e29-7320-ba34-a22d3bbe2e17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cc4aa-2e29-7586-96a5-f37f0b29f034" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cc4aa-2e29-75e3-b770-c9fdd80004b5" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cc4aa-2e29-7586-96a5-f37f0b29f034" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_019cc4aa-2e29-77ce-89a4-105dc3183e39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc4aa-2e29-7237-82e9-7478f19263d4" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_019cc4aa-2e29-77ce-89a4-105dc3183e39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7ec5-9a31-8f5202a3244b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cc4aa-2e29-79c5-b781-360f942273c4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7ec5-9a31-8f5202a3244b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ec5-9a31-8f5202a3244b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7ec5-9a31-8f5202a3244b" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7ec5-9a31-8f5202a3244b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74ac-af52-2b1e0b846b53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-7ec5-9a31-8f5202a3244b" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74ac-af52-2b1e0b846b53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-71bc-b649-4fc4d02ab565" xlink:href="nrim-20260331.xsd#nrim_OwnerOccupiedPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74ac-af52-2b1e0b846b53" xlink:to="loc_nrim_OwnerOccupiedPropertiesMember_019cc4aa-2e29-71bc-b649-4fc4d02ab565" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-74d4-9be8-8882a95c39c8" xlink:href="nrim-20260331.xsd#nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-74ac-af52-2b1e0b846b53" xlink:to="loc_nrim_PropertiesSecuredByJuniorLiensAndRevolvingSecuredByFamilyFirstLiensMember_019cc4aa-2e29-74d4-9be8-8882a95c39c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated_019cc4aa-2e29-76d6-8344-fae1369b572b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cc4aa-2e29-78bf-9f43-3750f626c278" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedAccumulated_019cc4aa-2e29-76d6-8344-fae1369b572b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/PurchasedReceivablesNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#PurchasedReceivablesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/PurchasedReceivablesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7cab-8295-8c807dc97814" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7ded-b2e4-694386b21f72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7cab-8295-8c807dc97814" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7ded-b2e4-694386b21f72" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7738-bf99-bdcfd0718cda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7ded-b2e4-694386b21f72" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7738-bf99-bdcfd0718cda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7738-bf99-bdcfd0718cda_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7738-bf99-bdcfd0718cda" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7738-bf99-bdcfd0718cda_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-70c5-851c-3ae4bf3b876e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7738-bf99-bdcfd0718cda" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-70c5-851c-3ae4bf3b876e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-73be-91dd-2b7ad19ab0ab" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-70c5-851c-3ae4bf3b876e" xlink:to="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-73be-91dd-2b7ad19ab0ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_019cc4aa-2e29-7cad-a8ce-496e990e344f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7ded-b2e4-694386b21f72" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_019cc4aa-2e29-7cad-a8ce-496e990e344f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_019cc4aa-2e29-7cad-a8ce-496e990e344f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_019cc4aa-2e29-7cad-a8ce-496e990e344f" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_019cc4aa-2e29-7cad-a8ce-496e990e344f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_019cc4aa-2e29-7b34-8cf7-39cf3e3bb36b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_019cc4aa-2e29-7cad-a8ce-496e990e344f" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_019cc4aa-2e29-7b34-8cf7-39cf3e3bb36b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonperformingFinancingReceivableMember_019cc4aa-2e29-76cd-9bd3-e20a69a76953" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonperformingFinancingReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_019cc4aa-2e29-7b34-8cf7-39cf3e3bb36b" xlink:to="loc_us-gaap_NonperformingFinancingReceivableMember_019cc4aa-2e29-76cd-9bd3-e20a69a76953" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivablesTermOfReceivable_019cc4aa-2e29-7cb5-aad2-1fea8539c95d" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivablesTermOfReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7cab-8295-8c807dc97814" xlink:to="loc_nrim_PurchasedReceivablesTermOfReceivable_019cc4aa-2e29-7cb5-aad2-1fea8539c95d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivableNonperformingNumber_019cc4aa-2e29-7405-99f3-77079140e0ac" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivableNonperformingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7cab-8295-8c807dc97814" xlink:to="loc_nrim_PurchasedReceivableNonperformingNumber_019cc4aa-2e29-7405-99f3-77079140e0ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7e6b-846c-83a188a230b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7cab-8295-8c807dc97814" xlink:to="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7e6b-846c-83a188a230b2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/PurchasedReceivablesSummaryofComponentsofNetPurchasedReceivablesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#PurchasedReceivablesSummaryofComponentsofNetPurchasedReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/PurchasedReceivablesSummaryofComponentsofNetPurchasedReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-74b4-a3c3-c8d442c8798c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7017-abe8-3b142f15b652" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-74b4-a3c3-c8d442c8798c" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7017-abe8-3b142f15b652" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-79ea-ae18-f1d168950040" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-7017-abe8-3b142f15b652" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-79ea-ae18-f1d168950040" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-79ea-ae18-f1d168950040_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-79ea-ae18-f1d168950040" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-79ea-ae18-f1d168950040_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7ba7-9d92-0501a71b7dbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-79ea-ae18-f1d168950040" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7ba7-9d92-0501a71b7dbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-7426-87c8-4a96ace43dd8" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7ba7-9d92-0501a71b7dbe" xlink:to="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-7426-87c8-4a96ace43dd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_019cc4aa-2e29-766f-8a15-15058d3c2962" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-74b4-a3c3-c8d442c8798c" xlink:to="loc_us-gaap_AccountsReceivableGross_019cc4aa-2e29-766f-8a15-15058d3c2962" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cc4aa-2e29-7fc3-9f78-e82f2f50df80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-74b4-a3c3-c8d442c8798c" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cc4aa-2e29-7fc3-9f78-e82f2f50df80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7713-ba0b-7d12a25621a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-74b4-a3c3-c8d442c8798c" xlink:to="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7713-ba0b-7d12a25621a0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/PurchasedReceivablesChangesintheACLonPurchaseReceivablesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#PurchasedReceivablesChangesintheACLonPurchaseReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/PurchasedReceivablesChangesintheACLonPurchaseReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7820-abaf-2025f5f62ca4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-795c-95ae-41763d6ffabe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7820-abaf-2025f5f62ca4" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-795c-95ae-41763d6ffabe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7135-ba14-4f2269f51537" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cc4aa-2e29-795c-95ae-41763d6ffabe" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7135-ba14-4f2269f51537" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7135-ba14-4f2269f51537_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7135-ba14-4f2269f51537" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7135-ba14-4f2269f51537_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7a82-9dcf-d9c926aab6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc4aa-2e29-7135-ba14-4f2269f51537" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7a82-9dcf-d9c926aab6ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-738f-bafe-eec3fb1a6f1e" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cc4aa-2e29-7a82-9dcf-d9c926aab6ab" xlink:to="loc_nrim_PurchasedReceivableMember_019cc4aa-2e29-738f-bafe-eec3fb1a6f1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc4aa-2e29-7820-abaf-2025f5f62ca4" xlink:to="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cc4aa-2e29-7d75-8766-08f8e283c666" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cc4aa-2e29-7d75-8766-08f8e283c666" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_019cc4aa-2e29-79c4-98c3-1cfa8a0a4f04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_019cc4aa-2e29-79c4-98c3-1cfa8a0a4f04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_019cc4aa-2e29-7793-96d9-75c936a1aee3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_019cc4aa-2e29-7793-96d9-75c936a1aee3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease_019cc4aa-2e29-784e-8f22-2d1e6c5afad9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease_019cc4aa-2e29-784e-8f22-2d1e6c5afad9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019cc4aa-2e29-7e21-9f5e-52004eb3c799" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_PurchasedReceivableAllowanceforLoanLossReserveRollForward_019cc4aa-2e29-7a94-a76f-bf0312b6f7ea" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019cc4aa-2e29-7e21-9f5e-52004eb3c799" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cc4aa-2e29-7bdd-a190-4fbe5daee51f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/ServicingRightsMortgageServicingRightsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#ServicingRightsMortgageServicingRightsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ServicingRightsMortgageServicingRightsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-794c-9f06-2c9d0e3e341d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-77e2-9ca7-c0ac55de76f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-794c-9f06-2c9d0e3e341d" xlink:to="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-77e2-9ca7-c0ac55de76f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7297-8a1e-510bce8c4f28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-77e2-9ca7-c0ac55de76f3" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7297-8a1e-510bce8c4f28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7297-8a1e-510bce8c4f28_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7297-8a1e-510bce8c4f28" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7297-8a1e-510bce8c4f28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7382-98fd-5844c84e0794" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7297-8a1e-510bce8c4f28" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7382-98fd-5844c84e0794" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7526-88e5-ad62069ab04c" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7382-98fd-5844c84e0794" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7526-88e5-ad62069ab04c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_019cc4aa-2e29-7e8c-bb8f-2e5b52531b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmountRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-794c-9f06-2c9d0e3e341d" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_019cc4aa-2e29-7e8c-bb8f-2e5b52531b2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7f51-87ce-ff95352deb88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_019cc4aa-2e29-7e8c-bb8f-2e5b52531b2e" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7f51-87ce-ff95352deb88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAdditions_019cc4aa-2e29-748e-8df4-397b113fb7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_019cc4aa-2e29-7e8c-bb8f-2e5b52531b2e" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAdditions_019cc4aa-2e29-748e-8df4-397b113fb7e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7d33-86ab-c93948aec1ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_019cc4aa-2e29-7e8c-bb8f-2e5b52531b2e" xlink:to="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7d33-86ab-c93948aec1ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc4aa-2e29-7871-b5f1-b1c8226535bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7d33-86ab-c93948aec1ce" xlink:to="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc4aa-2e29-7871-b5f1-b1c8226535bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_019cc4aa-2e29-70b2-bfd2-40a56803115c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7d33-86ab-c93948aec1ce" xlink:to="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_019cc4aa-2e29-70b2-bfd2-40a56803115c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-79ac-aaf0-49eb35b371b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/ServicingRightsKeyAssumptionsandtheSensitivityoftheFairValueDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#ServicingRightsKeyAssumptionsandtheSensitivityoftheFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ServicingRightsKeyAssumptionsandtheSensitivityoftheFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7801-bf08-c2db5e512e25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7801-bf08-c2db5e512e25" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-78d8-a36f-534322441403" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7801-bf08-c2db5e512e25" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-78d8-a36f-534322441403" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-78d8-a36f-534322441403_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-78d8-a36f-534322441403" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-78d8-a36f-534322441403_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-76c4-a912-5a2839efc968" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-78d8-a36f-534322441403" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-76c4-a912-5a2839efc968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7ffb-b898-70df851345f8" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-76c4-a912-5a2839efc968" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7ffb-b898-70df851345f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageLoansServicedForThirdParty_019cc4aa-2e29-74f7-95e5-c89f9fdc70aa" xlink:href="nrim-20260331.xsd#nrim_MortgageLoansServicedForThirdParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_nrim_MortgageLoansServicedForThirdParty_019cc4aa-2e29-74f7-95e5-c89f9fdc70aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageLoansServicedByThirdPartyWeightedAverageRateOfNote_019cc4aa-2e29-7947-86f8-9813494fc408" xlink:href="nrim-20260331.xsd#nrim_MortgageLoansServicedByThirdPartyWeightedAverageRateOfNote"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_nrim_MortgageLoansServicedByThirdPartyWeightedAverageRateOfNote_019cc4aa-2e29-7947-86f8-9813494fc408" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsPercentOfLoansServiced_019cc4aa-2e29-77af-9d8f-ea837d961a3b" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsPercentOfLoansServiced"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_nrim_MortgageServicingRightsPercentOfLoansServiced_019cc4aa-2e29-77af-9d8f-ea837d961a3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7001-aba7-5c7658278b13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7001-aba7-5c7658278b13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1_019cc4aa-2e29-7b80-a5d8-f9567b8384e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1_019cc4aa-2e29-7b80-a5d8-f9567b8384e5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_019cc4aa-2e29-74e0-99f1-bc0666120e81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-76e1-bd4a-88ec11b26be3" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_019cc4aa-2e29-74e0-99f1-bc0666120e81" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-7221-9a15-acd406dfa0b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_019cc4aa-2e29-74e0-99f1-bc0666120e81" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-7221-9a15-acd406dfa0b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed_019cc4aa-2e29-7995-9ce5-e7b1bee82190" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-7221-9a15-acd406dfa0b2" xlink:to="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed_019cc4aa-2e29-7995-9ce5-e7b1bee82190" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInPrepaymentSpeed_019cc4aa-2e29-7742-8923-804db4cbb4b0" xlink:href="nrim-20260331.xsd#nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInPrepaymentSpeed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-7221-9a15-acd406dfa0b2" xlink:to="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInPrepaymentSpeed_019cc4aa-2e29-7742-8923-804db4cbb4b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7a65-ac42-5c58b47652cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_019cc4aa-2e29-74e0-99f1-bc0666120e81" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7a65-ac42-5c58b47652cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf1PercentAdverseChangeInDiscountRate_019cc4aa-2e29-7c5b-b0f0-d42f45825d81" xlink:href="nrim-20260331.xsd#nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf1PercentAdverseChangeInDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7a65-ac42-5c58b47652cf" xlink:to="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf1PercentAdverseChangeInDiscountRate_019cc4aa-2e29-7c5b-b0f0-d42f45825d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf2PercentAdverseChangeInDiscountRate_019cc4aa-2e29-7189-9cb2-6e9165c25d6a" xlink:href="nrim-20260331.xsd#nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf2PercentAdverseChangeInDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7a65-ac42-5c58b47652cf" xlink:to="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf2PercentAdverseChangeInDiscountRate_019cc4aa-2e29-7189-9cb2-6e9165c25d6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueCostToServiceAssumptionsPerLoan_019cc4aa-2e29-7c78-b210-5e026a91e911" xlink:href="nrim-20260331.xsd#nrim_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueCostToServiceAssumptionsPerLoan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_019cc4aa-2e29-74e0-99f1-bc0666120e81" xlink:to="loc_nrim_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueCostToServiceAssumptionsPerLoan_019cc4aa-2e29-7c78-b210-5e026a91e911" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToServiceAssumptionsPercent_019cc4aa-2e29-7d75-8b60-412f64652e9d" xlink:href="nrim-20260331.xsd#nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToServiceAssumptionsPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueCostToServiceAssumptionsPerLoan_019cc4aa-2e29-7c78-b210-5e026a91e911" xlink:to="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToServiceAssumptionsPercent_019cc4aa-2e29-7d75-8b60-412f64652e9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInCostToServiceAssumptions_019cc4aa-2e29-7528-b5b3-7a3afe680db5" xlink:href="nrim-20260331.xsd#nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInCostToServiceAssumptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_nrim_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueCostToServiceAssumptionsPerLoan_019cc4aa-2e29-7c78-b210-5e026a91e911" xlink:to="loc_nrim_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf25PercentAdverseChangeInCostToServiceAssumptions_019cc4aa-2e29-7528-b5b3-7a3afe680db5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/ServicingRightsNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#ServicingRightsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/ServicingRightsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7ef8-8ce7-0a1276bfbec7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7ef8-8ce7-0a1276bfbec7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7ef8-8ce7-0a1276bfbec7" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-7c80-9fe0-469d8e33b81c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-78ef-b6a3-b4e8428f64b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-7c80-9fe0-469d8e33b81c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OtherNoninterestIncomeMember_019cc4aa-2e29-7124-8b25-be946c49976c" xlink:href="nrim-20260331.xsd#nrim_OtherNoninterestIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-7c80-9fe0-469d8e33b81c" xlink:to="loc_nrim_OtherNoninterestIncomeMember_019cc4aa-2e29-7124-8b25-be946c49976c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7b99-9237-5dde02b58709" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueTable_019cc4aa-2e29-7ef8-8ce7-0a1276bfbec7" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7b99-9237-5dde02b58709" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7b99-9237-5dde02b58709_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7b99-9237-5dde02b58709" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7b99-9237-5dde02b58709_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7dd4-ba2b-740a0cdd78f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7b99-9237-5dde02b58709" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7dd4-ba2b-740a0cdd78f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7101-ba5a-2896379b8e33" xlink:href="nrim-20260331.xsd#nrim_CommercialServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7dd4-ba2b-740a0cdd78f6" xlink:to="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7101-ba5a-2896379b8e33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FeesAndCommissionsMortgageServicing_019cc4aa-2e29-7b61-a024-3599d9e232fd" xlink:href="nrim-20260331.xsd#nrim_FeesAndCommissionsMortgageServicing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_nrim_FeesAndCommissionsMortgageServicing_019cc4aa-2e29-7b61-a024-3599d9e232fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-73f7-976c-20f8f554f554" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-73f7-976c-20f8f554f554" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialLoansServicedForThirdParty_019cc4aa-2e29-72d0-84aa-7681b6466b1f" xlink:href="nrim-20260331.xsd#nrim_CommercialLoansServicedForThirdParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_nrim_CommercialLoansServicedForThirdParty_019cc4aa-2e29-72d0-84aa-7681b6466b1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-75a6-95df-511984610f64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed_019cc4aa-2e29-75a6-95df-511984610f64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7dc1-a28b-c393e261f1de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems_019cc4aa-2e29-73ad-8726-d12b84c89206" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_019cc4aa-2e29-7dc1-a28b-c393e261f1de" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019db2df-3f8d-76a6-a990-8aeeca0097e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019db2df-3f8d-76a6-a990-8aeeca0097e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019db2df-3f8d-7f71-a21f-9253e978df06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019db2df-3f8d-76a6-a990-8aeeca0097e2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019db2df-3f8d-7f71-a21f-9253e978df06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019db2df-3f8d-7f71-a21f-9253e978df06_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019db2df-3f8d-7f71-a21f-9253e978df06" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019db2df-3f8d-7f71-a21f-9253e978df06_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019db2df-3f8d-70bf-bf98-858b2c0bb523" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019db2df-3f8d-7f71-a21f-9253e978df06" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019db2df-3f8d-70bf-bf98-858b2c0bb523" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019db2df-754c-778e-b0d7-1c4ae2cb9508" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019db2df-3f8d-70bf-bf98-858b2c0bb523" xlink:to="loc_us-gaap_BuildingMember_019db2df-754c-778e-b0d7-1c4ae2cb9508" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cc4aa-2e29-7156-bf7a-4de30b2659ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cc4aa-2e29-7156-bf7a-4de30b2659ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019cc4aa-2e29-7904-a99b-ee6101ad3d24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_us-gaap_OperatingLeaseLiability_019cc4aa-2e29-7904-a99b-ee6101ad3d24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019db2df-3f8d-796c-84b3-32aac30262bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019db2df-3f8d-796c-84b3-32aac30262bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_OperatingLeaseRightOfUseAssetPeriodIncreaseDecrease_019db2e4-a3ab-71a9-a2d3-ed0436f179a6" xlink:href="nrim-20260331.xsd#nrim_OperatingLeaseRightOfUseAssetPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_nrim_OperatingLeaseRightOfUseAssetPeriodIncreaseDecrease_019db2e4-a3ab-71a9-a2d3-ed0436f179a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019db2e7-347a-77e6-ab03-46b93931e9cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019db2df-3f8d-7d53-a72c-a950a77945ae" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019db2e7-347a-77e6-ab03-46b93931e9cd" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/DerivativesNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#DerivativesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/DerivativesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-76d4-8aab-cc2b22203024" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-76d4-8aab-cc2b22203024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76d4-8aab-cc2b22203024_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-76d4-8aab-cc2b22203024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76d4-8aab-cc2b22203024_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-76d4-8aab-cc2b22203024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_VariabletoFixedMember_019cc4aa-2e29-7bd2-8938-195f3468b59d" xlink:href="nrim-20260331.xsd#nrim_VariabletoFixedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:to="loc_nrim_VariabletoFixedMember_019cc4aa-2e29-7bd2-8938-195f3468b59d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FixedtoVariableMember_019cc4aa-2e29-7c07-880a-c2a0624238fa" xlink:href="nrim-20260331.xsd#nrim_FixedtoVariableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:to="loc_nrim_FixedtoVariableMember_019cc4aa-2e29-7c07-880a-c2a0624238fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7489-a1ed-7e5d369601bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:to="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7489-a1ed-7e5d369601bc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019db306-6f20-773c-b67d-65b2e29a8539" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7823-a93d-ed0b9a5ff381" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019db306-6f20-773c-b67d-65b2e29a8539" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cc4aa-2e29-7588-8c6a-f432e70ddf7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cc4aa-2e29-7e33-b9a2-a1ccdda398d7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cc4aa-2e29-7588-8c6a-f432e70ddf7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebtMember_019cc4aa-2e29-795c-a609-cf674d8a9817" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cc4aa-2e29-7588-8c6a-f432e70ddf7f" xlink:to="loc_us-gaap_SubordinatedDebtMember_019cc4aa-2e29-795c-a609-cf674d8a9817" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7662-860e-cda80f8c5b0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-7a2b-a8af-f0eb4dd547b1" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7662-860e-cda80f8c5b0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cc4aa-2e29-78fb-acec-e7db1195d932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7662-860e-cda80f8c5b0f" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cc4aa-2e29-78fb-acec-e7db1195d932" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019db309-b601-79d9-9dd9-8be08b8af76d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7662-860e-cda80f8c5b0f" xlink:to="loc_us-gaap_NondesignatedMember_019db309-b601-79d9-9dd9-8be08b8af76d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cc4aa-2e29-714e-8964-b3fb7e8379a5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-75f5-8c45-6c5428623ad0" xlink:to="loc_dei_LegalEntityAxis_019cc4aa-2e29-714e-8964-b3fb7e8379a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cc4aa-2e29-714e-8964-b3fb7e8379a5_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019cc4aa-2e29-714e-8964-b3fb7e8379a5" xlink:to="loc_dei_EntityDomain_019cc4aa-2e29-714e-8964-b3fb7e8379a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cc4aa-2e29-72d4-9a0f-6e94ad1f4937" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019cc4aa-2e29-714e-8964-b3fb7e8379a5" xlink:to="loc_dei_EntityDomain_019cc4aa-2e29-72d4-9a0f-6e94ad1f4937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_ResidentialMortgageHoldingCompanyLlcMember_019cc4aa-2e29-73fb-9759-030cc983533d" xlink:href="nrim-20260331.xsd#nrim_ResidentialMortgageHoldingCompanyLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cc4aa-2e29-72d4-9a0f-6e94ad1f4937" xlink:to="loc_nrim_ResidentialMortgageHoldingCompanyLlcMember_019cc4aa-2e29-73fb-9759-030cc983533d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_DerivativesValueShortfallsThresholdTriggeringAdditionalCollateralRequirements_019cc4aa-2e29-7dd6-a72d-d37f2c5bf5ed" xlink:href="nrim-20260331.xsd#nrim_DerivativesValueShortfallsThresholdTriggeringAdditionalCollateralRequirements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_nrim_DerivativesValueShortfallsThresholdTriggeringAdditionalCollateralRequirements_019cc4aa-2e29-7dd6-a72d-d37f2c5bf5ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019cc4aa-2e29-7e10-a780-8b3bc852ec6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019cc4aa-2e29-7e10-a780-8b3bc852ec6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_019cc4aa-2e29-748d-ab28-d9a01dbf4341" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_019cc4aa-2e29-748d-ab28-d9a01dbf4341" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019cc4aa-2e29-74f1-a426-b7864b266de8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019cc4aa-2e29-74f1-a426-b7864b266de8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019db2eb-3825-7491-9bee-cf623d891593" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019db2eb-3825-7491-9bee-cf623d891593" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansCommercial_019cc4aa-2e29-7b1b-be65-2644c3078075" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansCommercial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansCommercial_019cc4aa-2e29-7b1b-be65-2644c3078075" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019cc4aa-2e29-76aa-b430-453533c29983" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019cc4aa-2e29-76aa-b430-453533c29983" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cc4aa-2e29-7f76-ba57-ce42e96fa508" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cc4aa-2e29-7f76-ba57-ce42e96fa508" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_019d94ae-7029-72f1-8306-66cb1d20a2f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_019d94ae-7029-72f1-8306-66cb1d20a2f9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_TenorSpreadAdjustment_019cc4aa-2e29-71f5-abc4-b48f30e0256b" xlink:href="nrim-20260331.xsd#nrim_TenorSpreadAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_nrim_TenorSpreadAdjustment_019cc4aa-2e29-71f5-abc4-b48f30e0256b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cc4aa-2e29-774a-b9cf-5aa0c9b18e79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cc4aa-2e29-774a-b9cf-5aa0c9b18e79" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019cc4aa-2e29-7dc8-92a8-cd8f4772c030" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019cc4aa-2e29-7dc8-92a8-cd8f4772c030" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019cc4aa-2e29-7598-9e12-20b91dda4c07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralObligationToReturnCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019cc4aa-2e29-7598-9e12-20b91dda4c07" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociLossCashFlowHedgeCumulativeGainLossAfterTax_019cc4aa-2e29-77f6-ac37-abef3376a9c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AociLossCashFlowHedgeCumulativeGainLossAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_AociLossCashFlowHedgeCumulativeGainLossAfterTax_019cc4aa-2e29-77f6-ac37-abef3376a9c4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_UnfundedLendingCommitment_019cc4aa-2e29-714e-b652-d60f14a4fd8d" xlink:href="nrim-20260331.xsd#nrim_UnfundedLendingCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_nrim_UnfundedLendingCommitment_019cc4aa-2e29-714e-b652-d60f14a4fd8d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019db309-b601-7300-a14b-c4e695eb0c49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7863-80e0-f52bfce478d4" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019db309-b601-7300-a14b-c4e695eb0c49" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/DerivativesScheduleofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#DerivativesScheduleofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/DerivativesScheduleofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7fdd-a6f1-a39c7c558422" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-7b40-af74-b75fdc0927b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7fdd-a6f1-a39c7c558422" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-7b40-af74-b75fdc0927b4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-769c-823c-206812c1eee8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-7b40-af74-b75fdc0927b4" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-769c-823c-206812c1eee8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-769c-823c-206812c1eee8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-769c-823c-206812c1eee8" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-769c-823c-206812c1eee8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7c73-b316-d0455811a80e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-769c-823c-206812c1eee8" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7c73-b316-d0455811a80e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7916-a965-941f326a9a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-7c73-b316-d0455811a80e" xlink:to="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7916-a965-941f326a9a9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-7b40-af74-b75fdc0927b4" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76c0-8457-d02194d29c5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-79b3-bd99-9ad2a580c1c4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76c0-8457-d02194d29c5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7649-b941-b2401e968a19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76c0-8457-d02194d29c5a" xlink:to="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7649-b941-b2401e968a19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-790a-ae07-ddbf70a0dfb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76c0-8457-d02194d29c5a" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-790a-ae07-ddbf70a0dfb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-77ff-a0e5-187b8f7167b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-76c0-8457-d02194d29c5a" xlink:to="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-77ff-a0e5-187b8f7167b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cc4aa-2e29-723c-89d7-45f515b3cb5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cc4aa-2e29-7b40-af74-b75fdc0927b4" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cc4aa-2e29-723c-89d7-45f515b3cb5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-723c-89d7-45f515b3cb5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cc4aa-2e29-723c-89d7-45f515b3cb5b" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-723c-89d7-45f515b3cb5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-7e09-a44c-6e584d80c4f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cc4aa-2e29-723c-89d7-45f515b3cb5b" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-7e09-a44c-6e584d80c4f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_019cc4aa-2e29-704a-84bd-12e4e000713f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-7e09-a44c-6e584d80c4f3" xlink:to="loc_us-gaap_OtherAssetsMember_019cc4aa-2e29-704a-84bd-12e4e000713f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember_019cc4aa-2e29-7017-9e43-bc46a4eaee61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cc4aa-2e29-7e09-a44c-6e584d80c4f3" xlink:to="loc_us-gaap_OtherLiabilitiesMember_019cc4aa-2e29-7017-9e43-bc46a4eaee61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7fe3-82a8-9f207f5a2671" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7fdd-a6f1-a39c7c558422" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7fe3-82a8-9f207f5a2671" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7f7f-9948-79fff2dd743f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cc4aa-2e29-7fdd-a6f1-a39c7c558422" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7f7f-9948-79fff2dd743f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/DerivativesScheduleofDerivativeGainLossDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#DerivativesScheduleofDerivativeGainLossDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/DerivativesScheduleofDerivativeGainLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cc4aa-2e29-7192-8e17-c3300c05ee08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cc4aa-2e29-7a44-afd6-1868225f689a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cc4aa-2e29-7192-8e17-c3300c05ee08" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cc4aa-2e29-7a44-afd6-1868225f689a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cc4aa-2e29-7a44-afd6-1868225f689a" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-70ce-951a-ac15ac119109" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-73a9-b1c0-f6b8cfc4b31f" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-70ce-951a-ac15ac119109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7a60-bef8-eb59fe6c24df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-70ce-951a-ac15ac119109" xlink:to="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7a60-bef8-eb59fe6c24df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-70f9-9da9-9259e5773dc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cc4aa-2e29-7a44-afd6-1868225f689a" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-70f9-9da9-9259e5773dc7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-70f9-9da9-9259e5773dc7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-70f9-9da9-9259e5773dc7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-70f9-9da9-9259e5773dc7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b18-ad1b-1887257bb479" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-70f9-9da9-9259e5773dc7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b18-ad1b-1887257bb479" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-705d-b64d-f5a3729d5ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b18-ad1b-1887257bb479" xlink:to="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-705d-b64d-f5a3729d5ab3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7cfd-aed1-6f38497c5b65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b18-ad1b-1887257bb479" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7cfd-aed1-6f38497c5b65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-794b-8024-58a59d7119dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cc4aa-2e29-7a44-afd6-1868225f689a" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-794b-8024-58a59d7119dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-794b-8024-58a59d7119dd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-794b-8024-58a59d7119dd" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-794b-8024-58a59d7119dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-783e-9b24-875c1af9a7de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cc4aa-2e29-794b-8024-58a59d7119dd" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-783e-9b24-875c1af9a7de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncomeMember_019cc4aa-2e29-7244-91ef-b8bb5dd7d415" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cc4aa-2e29-783e-9b24-875c1af9a7de" xlink:to="loc_us-gaap_OtherIncomeMember_019cc4aa-2e29-7244-91ef-b8bb5dd7d415" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019cc4aa-2e29-73c1-9ca3-6c5123e71bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cc4aa-2e29-7192-8e17-c3300c05ee08" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019cc4aa-2e29-73c1-9ca3-6c5123e71bb3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/DerivativesScheduleofOffsettingAssetandLiabilityDerivativesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#DerivativesScheduleofOffsettingAssetandLiabilityDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/DerivativesScheduleofOffsettingAssetandLiabilityDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingAssetsLineItems_019cc4aa-2e29-7052-95aa-5775acf93e85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingAssetsTable_019cc4aa-2e29-73a4-b5fe-9da7737a5ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019cc4aa-2e29-7052-95aa-5775acf93e85" xlink:to="loc_us-gaap_OffsettingAssetsTable_019cc4aa-2e29-73a4-b5fe-9da7737a5ce3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OffsettingAssetsTable_019cc4aa-2e29-73a4-b5fe-9da7737a5ce3" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-786f-8375-8d9550f4aa61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cc4aa-2e29-78cc-b3ec-e5fa2a95b7cd" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-786f-8375-8d9550f4aa61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7e8e-a315-147fa6de658a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cc4aa-2e29-786f-8375-8d9550f4aa61" xlink:to="loc_us-gaap_NondesignatedMember_019cc4aa-2e29-7e8e-a315-147fa6de658a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7b3d-90eb-2ad3a247e052" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OffsettingAssetsTable_019cc4aa-2e29-73a4-b5fe-9da7737a5ce3" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7b3d-90eb-2ad3a247e052" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b3d-90eb-2ad3a247e052_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7b3d-90eb-2ad3a247e052" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7b3d-90eb-2ad3a247e052_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-728c-b086-4a4e51ac8ad6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7b3d-90eb-2ad3a247e052" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-728c-b086-4a4e51ac8ad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7824-9478-7cf7cc555c3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-728c-b086-4a4e51ac8ad6" xlink:to="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7824-9478-7cf7cc555c3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-72d6-bb6b-55cbb2fdc3dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-728c-b086-4a4e51ac8ad6" xlink:to="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-72d6-bb6b-55cbb2fdc3dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019cc4aa-2e29-7052-95aa-5775acf93e85" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7150-8683-f8dd68437bbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7150-8683-f8dd68437bbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cc4aa-2e29-796e-8209-22ea2e5f3a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cc4aa-2e29-796e-8209-22ea2e5f3a0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement_019cc4aa-2e29-7f35-b110-9a2acdb345d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement_019cc4aa-2e29-7f35-b110-9a2acdb345d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_019cc4aa-2e29-7388-917f-84d9e519e5d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_019cc4aa-2e29-7388-917f-84d9e519e5d0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralObligationToReturnSecurities_019cc4aa-2e29-7a23-8f3e-07cae1c17ca0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralObligationToReturnSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeCollateralObligationToReturnSecurities_019cc4aa-2e29-7a23-8f3e-07cae1c17ca0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019cc4aa-2e29-78e8-a0f0-6f0d9a8c0069" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019cff4c-a638-79cd-bfec-8a33e3699d4e" xlink:to="loc_us-gaap_DerivativeAssetFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019cc4aa-2e29-78e8-a0f0-6f0d9a8c0069" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019cc4aa-2e29-7052-95aa-5775acf93e85" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cff4b-1355-7ec6-b14a-202d1ef6c6b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cff4b-1355-7ec6-b14a-202d1ef6c6b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cff4b-1355-7214-a8aa-0d0cdb294c99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cff4b-1355-7214-a8aa-0d0cdb294c99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019cff4b-1355-765d-abd2-677d11b0b3a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019cff4b-1355-765d-abd2-677d11b0b3a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_019cff4b-1355-7882-9dfb-7f49e879ea53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_019cff4b-1355-7882-9dfb-7f49e879ea53" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimSecurities_019cff4b-1355-7016-8d2a-d08bbbaf1c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeCollateralRightToReclaimSecurities_019cff4b-1355-7016-8d2a-d08bbbaf1c63" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019cff4b-1355-72d8-a025-a60c313d06cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019cff4d-04fb-790d-865e-dc12854b9f78" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019cff4b-1355-72d8-a025-a60c313d06cb" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/SubordinatedDebtDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#SubordinatedDebtDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/SubordinatedDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedBorrowingTable_019db316-d9fb-74fd-b33b-4c5f0111bfda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedBorrowingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_SubordinatedBorrowingTable_019db316-d9fb-74fd-b33b-4c5f0111bfda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019db316-d9fb-7c14-ac84-ddd518392434" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubordinatedBorrowingTable_019db316-d9fb-74fd-b33b-4c5f0111bfda" xlink:to="loc_dei_LegalEntityAxis_019db316-d9fb-7c14-ac84-ddd518392434" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019db316-d9fb-7c14-ac84-ddd518392434_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019db316-d9fb-7c14-ac84-ddd518392434" xlink:to="loc_dei_EntityDomain_019db316-d9fb-7c14-ac84-ddd518392434_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019db316-d9fb-7979-aa2e-e795096fee77" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019db316-d9fb-7c14-ac84-ddd518392434" xlink:to="loc_dei_EntityDomain_019db316-d9fb-7979-aa2e-e795096fee77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_NorthrimStatutoryTrustTwoMember_019db316-d9fb-7941-8e60-a75141b2e6ca" xlink:href="nrim-20260331.xsd#nrim_NorthrimStatutoryTrustTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019db316-d9fb-7979-aa2e-e795096fee77" xlink:to="loc_nrim_NorthrimStatutoryTrustTwoMember_019db316-d9fb-7941-8e60-a75141b2e6ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019db316-d9fb-75b6-9ce4-a95f456a98ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubordinatedBorrowingTable_019db316-d9fb-74fd-b33b-4c5f0111bfda" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019db316-d9fb-75b6-9ce4-a95f456a98ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-75b6-9ce4-a95f456a98ed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db316-d9fb-75b6-9ce4-a95f456a98ed" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-75b6-9ce4-a95f456a98ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-73c4-9ec6-b1193b4efb89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db316-d9fb-75b6-9ce4-a95f456a98ed" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-73c4-9ec6-b1193b4efb89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebtMember_019db316-d9fb-7d43-8879-9a3a055210d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-73c4-9ec6-b1193b4efb89" xlink:to="loc_us-gaap_SubordinatedDebtMember_019db316-d9fb-7d43-8879-9a3a055210d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorSubordinatedNotesMember_019db316-d9fb-75c5-9170-b4395332abfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorSubordinatedNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019db316-d9fb-73c4-9ec6-b1193b4efb89" xlink:to="loc_us-gaap_SeniorSubordinatedNotesMember_019db316-d9fb-75c5-9170-b4395332abfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019db316-d9fb-77bb-95df-e21c9cf3d4f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubordinatedBorrowingTable_019db316-d9fb-74fd-b33b-4c5f0111bfda" xlink:to="loc_us-gaap_DebtInstrumentAxis_019db316-d9fb-77bb-95df-e21c9cf3d4f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db316-d9fb-77bb-95df-e21c9cf3d4f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db316-d9fb-77bb-95df-e21c9cf3d4f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db316-d9fb-77bb-95df-e21c9cf3d4f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db316-d9fb-7805-9a32-0c781d28c6ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db316-d9fb-77bb-95df-e21c9cf3d4f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db316-d9fb-7805-9a32-0c781d28c6ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SubordinatedNotesDue2035TheNotesMember_019db316-d9fb-7c14-b480-bde8bb992eee" xlink:href="nrim-20260331.xsd#nrim_SubordinatedNotesDue2035TheNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019db316-d9fb-7805-9a32-0c781d28c6ec" xlink:to="loc_nrim_SubordinatedNotesDue2035TheNotesMember_019db316-d9fb-7c14-b480-bde8bb992eee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019db316-d9fb-7843-a9cd-70bfa3b5fa66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_OtherAssets_019db316-d9fb-7843-a9cd-70bfa3b5fa66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_JuniorSubordinatedNotes_019db316-d9fb-71f7-beee-fd313b3209e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_JuniorSubordinatedNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_JuniorSubordinatedNotes_019db316-d9fb-71f7-beee-fd313b3209e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SecuredOvernightFinancingRatePeriod_019db316-d9fb-773d-b392-d570e80abf06" xlink:href="nrim-20260331.xsd#nrim_SecuredOvernightFinancingRatePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_nrim_SecuredOvernightFinancingRatePeriod_019db316-d9fb-773d-b392-d570e80abf06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_TenorSpreadAdjustment_019db316-d9fb-7650-b0f5-81bbbe58ecfd" xlink:href="nrim-20260331.xsd#nrim_TenorSpreadAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_nrim_TenorSpreadAdjustment_019db316-d9fb-7650-b0f5-81bbbe58ecfd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019db316-d9fb-7bc8-b1a0-f8f17310d562" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019db316-d9fb-7bc8-b1a0-f8f17310d562" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockLiquidationPreference_019db316-d9fb-7892-9ddf-80aa73d9d71d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_PreferredStockLiquidationPreference_019db316-d9fb-7892-9ddf-80aa73d9d71d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019db316-d9fb-7242-ab85-20760ccecb40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019db316-d9fb-7242-ab85-20760ccecb40" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019db316-d9fb-7d6a-adfe-98d8a24df488" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019db316-d9fb-7d6a-adfe-98d8a24df488" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019db316-d9fb-7051-a983-32d16ee98a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_InterestExpenseOperating_019db316-d9fb-7051-a983-32d16ee98a4e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019db316-d9fb-738b-83f7-77a6a1c461d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019db316-d9fb-738b-83f7-77a6a1c461d8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019db316-d9fb-78cd-83ac-ccaa79f95a41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019db316-d9fb-78cd-83ac-ccaa79f95a41" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019db316-d9fb-7d9d-9463-d17c2b2daf14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019db316-d9fb-7d9d-9463-d17c2b2daf14" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestCostsIncurred_019db316-d9fb-7ef7-b91e-28c50c2d003a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestCostsIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_InterestCostsIncurred_019db316-d9fb-7ef7-b91e-28c50c2d003a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_019db316-d9fb-78bc-94a9-0f9187e0be4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_019db316-d9fb-78bc-94a9-0f9187e0be4f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019db316-d9fb-76d2-8b41-a659248a0e5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019db316-d9fb-76d2-8b41-a659248a0e5d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019db316-d9fb-768f-a365-994718747192" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019db316-d9fb-72ca-9656-e5008bb36c24" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019db316-d9fb-768f-a365-994718747192" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsScheduleofEstimatedFairValuesDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsScheduleofEstimatedFairValuesDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsScheduleofEstimatedFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cc4aa-2e29-7cb2-af1b-1ef361297d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cc4aa-2e29-7cb2-af1b-1ef361297d9b" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7cfc-b2ab-43894669271b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7cfc-b2ab-43894669271b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7cfc-b2ab-43894669271b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7cfc-b2ab-43894669271b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7cfc-b2ab-43894669271b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7c38-b808-045a119413aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7cfc-b2ab-43894669271b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7c38-b808-045a119413aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7188-b3b1-6e77d8bea405" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7c38-b808-045a119413aa" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7188-b3b1-6e77d8bea405" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-74a3-8d0c-6b92a0d6edf2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7c38-b808-045a119413aa" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-74a3-8d0c-6b92a0d6edf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-7770-b6d2-e3a5e6a65085" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7c38-b808-045a119413aa" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-7770-b6d2-e3a5e6a65085" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019cc4aa-2e29-741f-8d39-165d264e2519" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019cc4aa-2e29-741f-8d39-165d264e2519" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-741f-8d39-165d264e2519_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cc4aa-2e29-741f-8d39-165d264e2519" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-741f-8d39-165d264e2519_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cc4aa-2e29-73e9-a4d8-923e564cdde0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cc4aa-2e29-741f-8d39-165d264e2519" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cc4aa-2e29-73e9-a4d8-923e564cdde0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-7785-8ac0-dd0c7ac566c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cc4aa-2e29-73e9-a4d8-923e564cdde0" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-7785-8ac0-dd0c7ac566c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cc4aa-2e29-749f-ac89-422cdfe2a092" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-7785-8ac0-dd0c7ac566c4" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cc4aa-2e29-749f-ac89-422cdfe2a092" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cc4aa-2e29-7622-954a-135830761af6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc4aa-2e29-7785-8ac0-dd0c7ac566c4" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cc4aa-2e29-7622-954a-135830761af6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7c86-a42a-b9430acc23fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7c86-a42a-b9430acc23fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7c86-a42a-b9430acc23fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7c86-a42a-b9430acc23fa" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7c86-a42a-b9430acc23fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7c86-a42a-b9430acc23fa" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7794-8327-ca02557ecc62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:to="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-7794-8327-ca02557ecc62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_InterestRateSwapJuniorSubordinatedDebtMember_019db7fa-c6f2-76ca-9b74-2ecf9166fc41" xlink:href="nrim-20260331.xsd#nrim_InterestRateSwapJuniorSubordinatedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:to="loc_nrim_InterestRateSwapJuniorSubordinatedDebtMember_019db7fa-c6f2-76ca-9b74-2ecf9166fc41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019db31d-92d4-7287-af28-c890f1b64db7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:to="loc_us-gaap_InterestRateContractMember_019db31d-92d4-7287-af28-c890f1b64db7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7073-81ed-72344478e487" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7153-972e-e390063f89e7" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7073-81ed-72344478e487" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cc4aa-2e29-722f-9020-b5fb3aaae5a8" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7a21-ab70-32b93d2b6315" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-73ed-a7a0-e3c2bbefb8f3" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7a21-ab70-32b93d2b6315" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-73dc-b19b-7f109184235d" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7a21-ab70-32b93d2b6315" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-73dc-b19b-7f109184235d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-770a-abc4-9d0688be453b" xlink:href="nrim-20260331.xsd#nrim_CommercialServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7a21-ab70-32b93d2b6315" xlink:to="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-770a-abc4-9d0688be453b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cc4aa-2e29-7cb2-af1b-1ef361297d9b" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019cc4aa-2e29-71d3-9e14-3a994dad253a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019cc4aa-2e29-71d3-9e14-3a994dad253a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2e29-7706-abde-f06133a61928" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2e29-7706-abde-f06133a61928" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2e29-717c-8256-7295af3649e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2e29-717c-8256-7295af3649e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc4aa-2e29-71b6-8d6d-453c0ad66319" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc4aa-2e29-71b6-8d6d-453c0ad66319" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7a79-8b13-0cca4d1da8d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-7a79-8b13-0cca4d1da8d5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_019cc4aa-2e29-74fe-aa7b-e807806a78c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesFairValue_019cc4aa-2e29-74fe-aa7b-e807806a78c0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_019cc4aa-2e29-7a79-8c1e-b42d826de7f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_LoansReceivableFairValueDisclosure_019cc4aa-2e29-7a79-8c1e-b42d826de7f6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_PurchasedReceivablesFairValueDisclosure_019cc4aa-2e29-7483-9915-ae9094413dbf" xlink:href="nrim-20260331.xsd#nrim_PurchasedReceivablesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_nrim_PurchasedReceivablesFairValueDisclosure_019cc4aa-2e29-7483-9915-ae9094413dbf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7f34-ae3c-68b3ef9ba9b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cc4aa-2e29-73d9-9e0f-46ac869b8164" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7f34-ae3c-68b3ef9ba9b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cc4aa-2e29-7cb2-af1b-1ef361297d9b" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_TimeDepositsFairValueDisclosure_019cc4aa-2e29-7244-a673-6f92c5ebdc94" xlink:href="nrim-20260331.xsd#nrim_TimeDepositsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:to="loc_nrim_TimeDepositsFairValueDisclosure_019cc4aa-2e29-7244-a673-6f92c5ebdc94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_019cc4aa-2e29-7633-8dd9-af782ccf1acb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_019cc4aa-2e29-7633-8dd9-af782ccf1acb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7998-b506-d076adde1d60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7998-b506-d076adde1d60" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_JuniorSubordinatedDebenturesFairValueDisclosure_019db32e-98e8-729c-9c38-a84d249070ba" xlink:href="nrim-20260331.xsd#nrim_JuniorSubordinatedDebenturesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:to="loc_nrim_JuniorSubordinatedDebenturesFairValueDisclosure_019db32e-98e8-729c-9c38-a84d249070ba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_019cc4aa-2e29-77d2-9daf-ac8c682db2d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosureAbstract_019cc4aa-2e29-744e-9827-e5afa2ae7796" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_019cc4aa-2e29-77d2-9daf-ac8c682db2d0" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsScheduleofAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsScheduleofAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsScheduleofAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7f03-ad24-de58fdae4c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7f03-ad24-de58fdae4c9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7f03-ad24-de58fdae4c9e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-750f-96af-37ed2b391a27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-73e7-8b1e-9d9661f5bad0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-750f-96af-37ed2b391a27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7e14-8e46-3f066279bdd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-750f-96af-37ed2b391a27" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7e14-8e46-3f066279bdd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-7f38-ba9d-f6f4baca7092" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-750f-96af-37ed2b391a27" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-7f38-ba9d-f6f4baca7092" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-718a-bd36-a8fe552eb0b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-750f-96af-37ed2b391a27" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-718a-bd36-a8fe552eb0b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7716-a32b-17640b7433a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7f03-ad24-de58fdae4c9e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7716-a32b-17640b7433a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7716-a32b-17640b7433a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7716-a32b-17640b7433a6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7716-a32b-17640b7433a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7716-a32b-17640b7433a6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019cff52-7043-75b9-a379-6f92884d65cf" xlink:href="nrim-20260331.xsd#nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_nrim_USTreasurySecuritiesAndUSGovernmentSponsoredEnterprisesDebtSecuritiesMember_019cff52-7043-75b9-a379-6f92884d65cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945f-72e0-7591-a827-b0085ca56daa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019d945f-72e0-7591-a827-b0085ca56daa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2e29-72ef-8f40-03e1dc4d6020" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cc4aa-2e29-72ef-8f40-03e1dc4d6020" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2e29-7ba0-975a-897ac0989a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_us-gaap_CollateralizedLoanObligationsMember_019cc4aa-2e29-7ba0-975a-897ac0989a0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019cc4aa-2e29-7262-9e46-d8c58eb804da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_us-gaap_EquitySecuritiesMember_019cc4aa-2e29-7262-9e46-d8c58eb804da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7b57-a35d-f98bc0b1feb5" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-7b57-a35d-f98bc0b1feb5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7920-ba37-51f0e7b1dbb3" xlink:href="nrim-20260331.xsd#nrim_CommercialServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-712e-adae-87d9b70bbda3" xlink:to="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7920-ba37-51f0e7b1dbb3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7a8d-810f-c725507bf2a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7f03-ad24-de58fdae4c9e" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7a8d-810f-c725507bf2a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7a8d-810f-c725507bf2a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7a8d-810f-c725507bf2a8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7a8d-810f-c725507bf2a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7155-b3a9-f91913f7672f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-7a8d-810f-c725507bf2a8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7155-b3a9-f91913f7672f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-751a-ba17-35eaadf1235a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7155-b3a9-f91913f7672f" xlink:to="loc_us-gaap_InterestRateSwapMember_019cc4aa-2e29-751a-ba17-35eaadf1235a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-758d-b137-93bd5caf4474" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7155-b3a9-f91913f7672f" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-758d-b137-93bd5caf4474" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-7e4d-96cb-2b7ee4b32c99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-7155-b3a9-f91913f7672f" xlink:to="loc_us-gaap_InterestRateContractMember_019cc4aa-2e29-7e4d-96cb-2b7ee4b32c99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2e29-7868-9c39-8c7c4b565bde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cc4aa-2e29-7868-9c39-8c7c4b565bde" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2e29-78be-98ba-135cc81a8006" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019cc4aa-2e29-78be-98ba-135cc81a8006" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019db34c-8912-79e0-b1fd-d08c386f9eb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019db34c-8912-79e0-b1fd-d08c386f9eb1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-737f-abc9-6d48d6e7700f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cc4aa-2e29-737f-abc9-6d48d6e7700f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7322-9c61-195eb23a9342" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_019cc4aa-2e29-7322-9c61-195eb23a9342" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_019cc4aa-2e29-7844-88c9-6b2d4610ff3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_019cc4aa-2e29-7844-88c9-6b2d4610ff3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7293-a27b-25451573fdbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc4aa-2e29-7293-a27b-25451573fdbc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_019cc4aa-2e29-7c69-bdb5-84093202def6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7b37-8d35-1883f367e0f1" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_019cc4aa-2e29-7c69-bdb5-84093202def6" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsReconciliationofAssetswithUnobservableInputsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsReconciliationofAssetswithUnobservableInputsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsReconciliationofAssetswithUnobservableInputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc4aa-2e29-7fbf-aa52-495a11952a44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019cc4aa-2e29-75ac-b124-78e90468afc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc4aa-2e29-7fbf-aa52-495a11952a44" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019cc4aa-2e29-75ac-b124-78e90468afc9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-701f-b437-ab2510a96831" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019cc4aa-2e29-75ac-b124-78e90468afc9" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-701f-b437-ab2510a96831" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-701f-b437-ab2510a96831_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-701f-b437-ab2510a96831" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-701f-b437-ab2510a96831_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-74df-848c-32fb6da07b8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cc4aa-2e29-701f-b437-ab2510a96831" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-74df-848c-32fb6da07b8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7cc1-937b-2477de32d7cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateLockCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cc4aa-2e29-74df-848c-32fb6da07b8e" xlink:to="loc_us-gaap_InterestRateLockCommitmentsMember_019cc4aa-2e29-7cc1-937b-2477de32d7cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77b8-958e-e61b406f8708" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019cc4aa-2e29-75ac-b124-78e90468afc9" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77b8-958e-e61b406f8708" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-77b8-958e-e61b406f8708_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77b8-958e-e61b406f8708" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-77b8-958e-e61b406f8708_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7683-8dd7-8812466d73b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-77b8-958e-e61b406f8708" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7683-8dd7-8812466d73b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-764c-ad7e-6be459e657c7" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7683-8dd7-8812466d73b1" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-764c-ad7e-6be459e657c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7431-b0fb-0d80619f3280" xlink:href="nrim-20260331.xsd#nrim_CommercialServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7683-8dd7-8812466d73b1" xlink:to="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7431-b0fb-0d80619f3280" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc4aa-2e29-7fbf-aa52-495a11952a44" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cc4aa-2e29-70d0-aff7-34f42dabb978" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cc4aa-2e29-70d0-aff7-34f42dabb978" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_019cc4aa-2e29-7956-aa54-28f9bc7dc75f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_019cc4aa-2e29-7956-aa54-28f9bc7dc75f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesAndIssuances_019cc4aa-2e29-73d0-b1a2-e2afbdf95890" xlink:href="nrim-20260331.xsd#nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesAndIssuances"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:to="loc_nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesAndIssuances_019cc4aa-2e29-73d0-b1a2-e2afbdf95890" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements_019cc4aa-2e29-7a9d-bf15-47882c0cc076" xlink:href="nrim-20260331.xsd#nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc4aa-2e29-7309-b5b1-981bf3d925af" xlink:to="loc_nrim_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements_019cc4aa-2e29-7a9d-bf15-47882c0cc076" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cc4aa-2e29-7f77-8d46-de85b4d1d400" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_019cc4aa-2e29-7b19-b4c9-b6cecfdf7572" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc4aa-2e29-7fbf-aa52-495a11952a44" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_019cc4aa-2e29-7b19-b4c9-b6cecfdf7572" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_019cff53-5b89-7ee3-8004-34992e6d7745" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc4aa-2e29-7fbf-aa52-495a11952a44" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_019cff53-5b89-7ee3-8004-34992e6d7745" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsAssetsMeasuredonaNonrecurringBasisDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsAssetsMeasuredonaNonrecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsAssetsMeasuredonaNonrecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7535-b5e4-0dc94bdf7399" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7323-924b-65c126bd6e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7535-b5e4-0dc94bdf7399" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7323-924b-65c126bd6e2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7323-924b-65c126bd6e2f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-75b8-986f-cb4888bafde5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc4aa-2e29-7d91-abe8-5fc70a75c8ba" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-75b8-986f-cb4888bafde5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7ae3-bc2f-e430677128e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-75b8-986f-cb4888bafde5" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cc4aa-2e29-7ae3-bc2f-e430677128e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-7357-a26f-975d3e8dd385" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-75b8-986f-cb4888bafde5" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cc4aa-2e29-7357-a26f-975d3e8dd385" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-771a-9f05-68e529899af1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc4aa-2e29-75b8-986f-cb4888bafde5" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cc4aa-2e29-771a-9f05-68e529899af1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cc4aa-2e29-7247-a51c-4458094191b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7323-924b-65c126bd6e2f" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cc4aa-2e29-7247-a51c-4458094191b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cc4aa-2e29-7247-a51c-4458094191b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cc4aa-2e29-7247-a51c-4458094191b6" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cc4aa-2e29-7247-a51c-4458094191b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cc4aa-2e29-79b6-a414-7f9517568a1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cc4aa-2e29-7247-a51c-4458094191b6" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cc4aa-2e29-79b6-a414-7f9517568a1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019cc4aa-2e29-7651-9988-51cfab2d1a5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cc4aa-2e29-79b6-a414-7f9517568a1e" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019cc4aa-2e29-7651-9988-51cfab2d1a5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_019cc4aa-2e29-7155-b9a3-5dca4f51b3b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7535-b5e4-0dc94bdf7399" xlink:to="loc_us-gaap_LoansReceivableFairValueDisclosure_019cc4aa-2e29-7155-b9a3-5dca4f51b3b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cc4aa-2e29-7104-b4c2-65022b174b87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7535-b5e4-0dc94bdf7399" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019cc4aa-2e29-7104-b4c2-65022b174b87" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsScheduleofGainsandLossesResultingfromNonrecurringFairValueAdjustmentsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsScheduleofGainsandLossesResultingfromNonrecurringFairValueAdjustmentsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsScheduleofGainsandLossesResultingfromNonrecurringFairValueAdjustmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7049-8b1a-f6cb20fd3f43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7616-a6ad-d5d900052aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7049-8b1a-f6cb20fd3f43" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7616-a6ad-d5d900052aeb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-76cd-bb29-a82c3c4a056f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc4aa-2e29-7616-a6ad-d5d900052aeb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-76cd-bb29-a82c3c4a056f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-76cd-bb29-a82c3c4a056f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-76cd-bb29-a82c3c4a056f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-76cd-bb29-a82c3c4a056f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7716-8db0-f68b2d715a8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-76cd-bb29-a82c3c4a056f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7716-8db0-f68b2d715a8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceReceivablesMember_019cc4aa-2e29-715e-babd-d420f975d158" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7716-8db0-f68b2d715a8a" xlink:to="loc_us-gaap_FinanceReceivablesMember_019cc4aa-2e29-715e-babd-d420f975d158" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_AssetsFairValueDisclosureNonrecurringGainLoss_019cc4aa-2e29-790b-bade-5056e92fa9d8" xlink:href="nrim-20260331.xsd#nrim_AssetsFairValueDisclosureNonrecurringGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cc4aa-2e29-7049-8b1a-f6cb20fd3f43" xlink:to="loc_nrim_AssetsFairValueDisclosureNonrecurringGainLoss_019cc4aa-2e29-790b-bade-5056e92fa9d8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/FairValueMeasurementsValuationAssumptionsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#FairValueMeasurementsValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/FairValueMeasurementsValuationAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc4aa-2e29-73c0-9ac7-a2e156f39b73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc4aa-2e29-73c0-9ac7-a2e156f39b73" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019cc4aa-2e29-7142-8968-5f59283634d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019cc4aa-2e29-7142-8968-5f59283634d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-7142-8968-5f59283634d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019cc4aa-2e29-7142-8968-5f59283634d1" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-7142-8968-5f59283634d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-79cc-98cc-1fdd741b01a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019cc4aa-2e29-7142-8968-5f59283634d1" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-79cc-98cc-1fdd741b01a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MeasurementInputPullThroughRateMember_019cc4aa-2e29-7463-b96d-8fa0b7a99c10" xlink:href="nrim-20260331.xsd#nrim_MeasurementInputPullThroughRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-79cc-98cc-1fdd741b01a2" xlink:to="loc_nrim_MeasurementInputPullThroughRateMember_019cc4aa-2e29-7463-b96d-8fa0b7a99c10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputConstantPrepaymentRateMember_019cc4aa-2e29-7821-a0c5-c62f3993bcea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputConstantPrepaymentRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-79cc-98cc-1fdd741b01a2" xlink:to="loc_us-gaap_MeasurementInputConstantPrepaymentRateMember_019cc4aa-2e29-7821-a0c5-c62f3993bcea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_019cc4aa-2e29-7ae9-ab0e-c8a2f4f327f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019cc4aa-2e29-79cc-98cc-1fdd741b01a2" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_019cc4aa-2e29-7ae9-ab0e-c8a2f4f327f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019cc4aa-2e29-7aa9-8e27-75daa2808eb5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019cc4aa-2e29-7aa9-8e27-75daa2808eb5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7aa9-8e27-75daa2808eb5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cc4aa-2e29-7aa9-8e27-75daa2808eb5" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7aa9-8e27-75daa2808eb5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7d96-b966-5cbca1de939f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cc4aa-2e29-7aa9-8e27-75daa2808eb5" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7d96-b966-5cbca1de939f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_019cc4aa-2e29-7da4-bf6b-07236a180be2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7d96-b966-5cbca1de939f" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_019cc4aa-2e29-7da4-bf6b-07236a180be2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cc4aa-2e29-720e-bb21-8065927579d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cc4aa-2e29-7d96-b966-5cbca1de939f" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cc4aa-2e29-720e-bb21-8065927579d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7bc6-887f-243310a179be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7bc6-887f-243310a179be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7bc6-887f-243310a179be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7bc6-887f-243310a179be" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7bc6-887f-243310a179be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7c5a-b452-179edf5709c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cc4aa-2e29-7bc6-887f-243310a179be" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7c5a-b452-179edf5709c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceReceivablesMember_019cc4aa-2e29-7f61-8f75-7ab27458d743" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7c5a-b452-179edf5709c2" xlink:to="loc_us-gaap_FinanceReceivablesMember_019cc4aa-2e29-7f61-8f75-7ab27458d743" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-78ec-9bf4-3147913f48ef" xlink:href="nrim-20260331.xsd#nrim_MortgageServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7c5a-b452-179edf5709c2" xlink:to="loc_nrim_MortgageServicingRightsMember_019cc4aa-2e29-78ec-9bf4-3147913f48ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7bf9-a2ed-0622e23f9133" xlink:href="nrim-20260331.xsd#nrim_CommercialServicingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc4aa-2e29-7c5a-b452-179edf5709c2" xlink:to="loc_nrim_CommercialServicingRightsMember_019cc4aa-2e29-7bf9-a2ed-0622e23f9133" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cc4aa-2e29-715f-a2a9-8b5322069965" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:to="loc_srt_RangeAxis_019cc4aa-2e29-715f-a2a9-8b5322069965" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cc4aa-2e29-715f-a2a9-8b5322069965_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cc4aa-2e29-715f-a2a9-8b5322069965" xlink:to="loc_srt_RangeMember_019cc4aa-2e29-715f-a2a9-8b5322069965_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cc4aa-2e29-79d6-81ff-4e01d5c91cfe" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cc4aa-2e29-715f-a2a9-8b5322069965" xlink:to="loc_srt_RangeMember_019cc4aa-2e29-79d6-81ff-4e01d5c91cfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_019cc4aa-2e29-7828-ac2a-76ba10c0ba9d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cc4aa-2e29-79d6-81ff-4e01d5c91cfe" xlink:to="loc_srt_WeightedAverageMember_019cc4aa-2e29-7828-ac2a-76ba10c0ba9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cc4aa-2e29-7d5d-96f1-7393308cf6f4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cc4aa-2e29-79d6-81ff-4e01d5c91cfe" xlink:to="loc_srt_MinimumMember_019cc4aa-2e29-7d5d-96f1-7393308cf6f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cc4aa-2e29-7210-813c-adbd64bf2f4a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cc4aa-2e29-79d6-81ff-4e01d5c91cfe" xlink:to="loc_srt_MaximumMember_019cc4aa-2e29-7210-813c-adbd64bf2f4a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019db800-fef2-7c5d-b3fb-46c4676f6595" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc4aa-2e29-71bc-8c60-1198bc6c0e54" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019db800-fef2-7c5d-b3fb-46c4676f6595" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7c5d-b3fb-46c4676f6595_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019db800-fef2-7c5d-b3fb-46c4676f6595" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7c5d-b3fb-46c4676f6595_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7e75-95fe-453e1ec0ff39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019db800-fef2-7c5d-b3fb-46c4676f6595" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7e75-95fe-453e1ec0ff39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019dd1b3-df82-7b43-8444-82e75afd1335" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7e75-95fe-453e1ec0ff39" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019dd1b3-df82-7b43-8444-82e75afd1335" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019db801-3035-75de-bc55-43be7a4a1962" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019db800-fef2-7e75-95fe-453e1ec0ff39" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019db801-3035-75de-bc55-43be7a4a1962" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetMeasurementInput_019cc4aa-2e29-7f14-867a-fe6c8d3d8c4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc4aa-2e29-73c0-9ac7-a2e156f39b73" xlink:to="loc_us-gaap_DerivativeAssetMeasurementInput_019cc4aa-2e29-7f14-867a-fe6c8d3d8c4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetMeasurementInput_019cc4aa-2e29-7e79-b59e-293f1ac058ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc4aa-2e29-73c0-9ac7-a2e156f39b73" xlink:to="loc_us-gaap_ServicingAssetMeasurementInput_019cc4aa-2e29-7e79-b59e-293f1ac058ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_FinancingReceivablesMeasurementInput_019cc4aa-2e29-718c-96c2-4a0b129f4a6b" xlink:href="nrim-20260331.xsd#nrim_FinancingReceivablesMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc4aa-2e29-73c0-9ac7-a2e156f39b73" xlink:to="loc_nrim_FinancingReceivablesMeasurementInput_019cc4aa-2e29-718c-96c2-4a0b129f4a6b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/SegmentInformationNarrativeDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#SegmentInformationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/SegmentInformationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7ece-838a-554da06aa521" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7394-b90f-598305788009" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7ece-838a-554da06aa521" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7394-b90f-598305788009" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7394-b90f-598305788009" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-79b9-bb97-c044b68fdf47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-729c-a0d0-e0cfea54e3c6" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-79b9-bb97-c044b68fdf47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7219-a076-979b9db0a8fd" xlink:href="nrim-20260331.xsd#nrim_CommunityBankingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-79b9-bb97-c044b68fdf47" xlink:to="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7219-a076-979b9db0a8fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019cc4aa-2e29-71e2-81b1-2bbbc57079ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7ece-838a-554da06aa521" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019cc4aa-2e29-71e2-81b1-2bbbc57079ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStores_019cc4aa-2e29-74e1-bba6-6dec82561366" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfStores"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7ece-838a-554da06aa521" xlink:to="loc_us-gaap_NumberOfStores_019cc4aa-2e29-74e1-bba6-6dec82561366" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019d9914-93ee-7eeb-b6ec-d6d0fe818a44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7ece-838a-554da06aa521" xlink:to="loc_us-gaap_NumberOfReportableSegments_019d9914-93ee-7eeb-b6ec-d6d0fe818a44" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/SegmentInformationScheduleofSegmentInformationDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#SegmentInformationScheduleofSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/SegmentInformationScheduleofSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7ae6-b1c5-220ca76dfb16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7ae6-b1c5-220ca76dfb16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-76c5-beda-01fdf5d29653" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7ae6-b1c5-220ca76dfb16" xlink:to="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-76c5-beda-01fdf5d29653" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-76c5-beda-01fdf5d29653_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-76c5-beda-01fdf5d29653" xlink:to="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-76c5-beda-01fdf5d29653_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-7b6d-8f93-36b80507d838" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-76c5-beda-01fdf5d29653" xlink:to="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-7b6d-8f93-36b80507d838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cc4aa-2e29-792e-8f8c-7adf126e3e67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-7b6d-8f93-36b80507d838" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cc4aa-2e29-792e-8f8c-7adf126e3e67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cc4aa-2e29-71ff-9ee0-2c06dc459697" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-7b6d-8f93-36b80507d838" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cc4aa-2e29-71ff-9ee0-2c06dc459697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7ae6-b1c5-220ca76dfb16" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7300-9e2d-956b222c80ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7587-b0b7-fe736e5cd3bd" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7300-9e2d-956b222c80ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7ced-94ba-a330a3ccbabb" xlink:href="nrim-20260331.xsd#nrim_CommunityBankingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7300-9e2d-956b222c80ad" xlink:to="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7ced-94ba-a330a3ccbabb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-7a6a-b267-d10c7226fe58" xlink:href="nrim-20260331.xsd#nrim_HomeMortgageLendingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7300-9e2d-956b222c80ad" xlink:to="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-7a6a-b267-d10c7226fe58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-75bf-a52a-26f715d99156" xlink:href="nrim-20260331.xsd#nrim_SpecialtyFinanceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7300-9e2d-956b222c80ad" xlink:to="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-75bf-a52a-26f715d99156" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2e29-7aef-9b8f-e123e855d30f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2e29-7aef-9b8f-e123e855d30f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019cc4aa-2e29-790e-a93f-ea93f7c76fca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestExpenseOperating_019cc4aa-2e29-790e-a93f-ea93f7c76fca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019cc4aa-2e29-7866-b248-5989b2dfac33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019cc4aa-2e29-7866-b248-5989b2dfac33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2e29-7791-90ee-f2b9681678e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2e29-7791-90ee-f2b9681678e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cc4aa-2e29-7424-bfbc-ffbd7204eb4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cc4aa-2e29-7424-bfbc-ffbd7204eb4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfMortgageLoans_019cc4aa-2e29-7dd7-9707-1659aa0b83c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfMortgageLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_GainLossOnSaleOfMortgageLoans_019cc4aa-2e29-7dd7-9707-1659aa0b83c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_LoanMortgageChangeInFairValue_019cc4aa-2e29-71e5-af4b-05dce6573441" xlink:href="nrim-20260331.xsd#nrim_LoanMortgageChangeInFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_nrim_LoanMortgageChangeInFairValue_019cc4aa-2e29-71e5-af4b-05dce6573441" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_LoanMortgageProductionRevenue_019cc4aa-2e29-7879-8edd-343513d0358a" xlink:href="nrim-20260331.xsd#nrim_LoanMortgageProductionRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_nrim_LoanMortgageProductionRevenue_019cc4aa-2e29-7879-8edd-343513d0358a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_InterestAndFeeIncomeLoansMortgageServicing_019cc4aa-2e29-7b7b-a241-2ada7bcbc8c8" xlink:href="nrim-20260331.xsd#nrim_InterestAndFeeIncomeLoansMortgageServicing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_nrim_InterestAndFeeIncomeLoansMortgageServicing_019cc4aa-2e29-7b7b-a241-2ada7bcbc8c8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7f5f-bd52-02372f64ea0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7f5f-bd52-02372f64ea0d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc4aa-2e29-7e71-9265-1466600ebcb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7f5f-bd52-02372f64ea0d" xlink:to="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc4aa-2e29-7e71-9265-1466600ebcb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_019cc4aa-2e29-744f-8b22-2ac2edc486f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc4aa-2e29-7f5f-bd52-02372f64ea0d" xlink:to="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_019cc4aa-2e29-744f-8b22-2ac2edc486f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_InterestAndFeeIncomeLoansMortgageServicingNet_019cc4aa-2e29-7682-b7dd-0a5501a37db3" xlink:href="nrim-20260331.xsd#nrim_InterestAndFeeIncomeLoansMortgageServicingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_nrim_InterestAndFeeIncomeLoansMortgageServicingNet_019cc4aa-2e29-7682-b7dd-0a5501a37db3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansOtherConsumer_019cc4aa-2e29-71eb-b016-df9a75eaf63b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansOtherConsumer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansOtherConsumer_019cc4aa-2e29-71eb-b016-df9a75eaf63b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2e29-71a1-8b0c-a7d96c2f3769" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansConsumer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2e29-71a1-8b0c-a7d96c2f3769" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_IncomePurchasedReceivables_019cc4aa-2e29-7cb4-9562-e85c23c87a04" xlink:href="nrim-20260331.xsd#nrim_IncomePurchasedReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_nrim_IncomePurchasedReceivables_019cc4aa-2e29-7cb4-9562-e85c23c87a04" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOther_019cc4aa-2e29-7be1-bbd3-eb0b148d59a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_NoninterestIncomeOther_019cc4aa-2e29-7be1-bbd3-eb0b148d59a6" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_019cc4aa-2e29-77b5-8957-bd714f7bfda6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_NoninterestIncome_019cc4aa-2e29-77b5-8957-bd714f7bfda6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2e29-7092-9c00-526123ceee88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2e29-7092-9c00-526123ceee88" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2e29-7b3c-9d29-4cb0347c3155" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InformationTechnologyAndDataProcessing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2e29-7b3c-9d29-4cb0347c3155" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019cc4aa-2e29-7ec8-9445-78350be91cff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OccupancyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_OccupancyNet_019cc4aa-2e29-7ec8-9445-78350be91cff" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019cc4aa-2e29-7c1d-b420-7b410fe22342" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_ProfessionalFees_019cc4aa-2e29-7c1d-b420-7b410fe22342" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingExpense_019cc4aa-2e29-7978-8084-ad7929fc463c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_MarketingExpense_019cc4aa-2e29-7978-8084-ad7929fc463c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2e29-77ec-8fcb-050b6607eb7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralInsuranceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2e29-77ec-8fcb-050b6607eb7f" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2e29-7380-95d4-4be09f9a9ecf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2e29-7380-95d4-4be09f9a9ecf" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019cc4aa-2e29-7548-b72f-f7499b3d1854" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019cc4aa-2e29-7548-b72f-f7499b3d1854" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019cc4aa-2e29-76a9-90dd-018cb8d00f0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_NoninterestExpense_019cc4aa-2e29-76a9-90dd-018cb8d00f0d" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2e29-7d4a-ae34-d29d6c1ae64d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2e29-7d4a-ae34-d29d6c1ae64d" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cc4aa-2e29-707f-bc75-d38bf50264f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cc4aa-2e29-707f-bc75-d38bf50264f7" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cc4aa-2e29-7e91-9d7c-e095bcf1a7cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7d02-926a-8ac7bc8066ab" xlink:to="loc_us-gaap_NetIncomeLoss_019cc4aa-2e29-7e91-9d7c-e095bcf1a7cd" xlink:type="arc" order="27"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/SegmentInformationReconciliationtoConsolidatedFinancialResultsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#SegmentInformationReconciliationtoConsolidatedFinancialResultsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/SegmentInformationReconciliationtoConsolidatedFinancialResultsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7d44-9ba6-95ae83d0db90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7d44-9ba6-95ae83d0db90" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-74f8-811e-fbed125c545f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7d44-9ba6-95ae83d0db90" xlink:to="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-74f8-811e-fbed125c545f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-74f8-811e-fbed125c545f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-74f8-811e-fbed125c545f" xlink:to="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-74f8-811e-fbed125c545f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-772e-bc26-c0db4cac1bc2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cc4aa-2e29-74f8-811e-fbed125c545f" xlink:to="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-772e-bc26-c0db4cac1bc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cc4aa-2e29-7f67-b6f5-a1ac43852f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-772e-bc26-c0db4cac1bc2" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cc4aa-2e29-7f67-b6f5-a1ac43852f6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cc4aa-2e29-7360-8547-5ab16793e062" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cc4aa-2e29-772e-bc26-c0db4cac1bc2" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cc4aa-2e29-7360-8547-5ab16793e062" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7f38-8f09-b8e9db16a683" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7d44-9ba6-95ae83d0db90" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7f38-8f09-b8e9db16a683" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f38-8f09-b8e9db16a683_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7f38-8f09-b8e9db16a683" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f38-8f09-b8e9db16a683_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f24-91ba-5ddeb1062491" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-7f38-8f09-b8e9db16a683" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f24-91ba-5ddeb1062491" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7df3-92e1-ff339c6f577d" xlink:href="nrim-20260331.xsd#nrim_CommunityBankingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f24-91ba-5ddeb1062491" xlink:to="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7df3-92e1-ff339c6f577d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-7ec4-a55d-50d55b24eb9a" xlink:href="nrim-20260331.xsd#nrim_HomeMortgageLendingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f24-91ba-5ddeb1062491" xlink:to="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-7ec4-a55d-50d55b24eb9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-7771-a3d5-d256f8f737fd" xlink:href="nrim-20260331.xsd#nrim_SpecialtyFinanceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7f24-91ba-5ddeb1062491" xlink:to="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-7771-a3d5-d256f8f737fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2e29-72b4-b610-c6e61cb5a10e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_019cc4aa-2e29-72b4-b610-c6e61cb5a10e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2e29-73a0-821d-ff59bc9a5947" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansConsumer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansConsumer_019cc4aa-2e29-73a0-821d-ff59bc9a5947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_IncomePurchasedReceivables_019cc4aa-2e29-7ee3-b00f-961464a4a267" xlink:href="nrim-20260331.xsd#nrim_IncomePurchasedReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_nrim_IncomePurchasedReceivables_019cc4aa-2e29-7ee3-b00f-961464a4a267" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOther_019cc4aa-2e29-7db0-9868-0b773721f3d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_NoninterestIncomeOther_019cc4aa-2e29-7db0-9868-0b773721f3d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019cc4aa-2e29-7202-a69a-d48705c94a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_Revenues_019cc4aa-2e29-7202-a69a-d48705c94a2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019cc4aa-2e29-7be2-b9f3-a568562175cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019cc4aa-2e29-7be2-b9f3-a568562175cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019cc4aa-2e29-7727-b185-513b94eaadf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019cc4aa-2e29-7be2-b9f3-a568562175cc" xlink:to="loc_us-gaap_InterestExpenseOperating_019cc4aa-2e29-7727-b185-513b94eaadf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2e29-76d9-a162-18d81c71a2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_019cc4aa-2e29-7be2-b9f3-a568562175cc" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cc4aa-2e29-76d9-a162-18d81c71a2fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019cc4aa-2e29-79e1-985b-ec412781845f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_GrossProfit_019cc4aa-2e29-79e1-985b-ec412781845f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2e29-7fb0-b825-5a3a1492fd5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019cc4aa-2e29-7fb0-b825-5a3a1492fd5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2e29-7393-885a-51c74e50e4d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InformationTechnologyAndDataProcessing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_019cc4aa-2e29-7393-885a-51c74e50e4d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019cc4aa-2e29-7e3a-980c-10e60e4d3aaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OccupancyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_OccupancyNet_019cc4aa-2e29-7e3a-980c-10e60e4d3aaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019cc4aa-2e29-7c59-8de8-c118548654e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_ProfessionalFees_019cc4aa-2e29-7c59-8de8-c118548654e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingExpense_019cc4aa-2e29-782f-b4a0-f5951b41e110" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_MarketingExpense_019cc4aa-2e29-782f-b4a0-f5951b41e110" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2e29-7f89-b6d3-a591f53cbf28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralInsuranceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_GeneralInsuranceExpense_019cc4aa-2e29-7f89-b6d3-a591f53cbf28" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2e29-781e-a126-ffef8f8fb66a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_CompensationExpenseExcludingCostOfGoodAndServiceSold_019cc4aa-2e29-781e-a126-ffef8f8fb66a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019cc4aa-2e29-7de3-98d8-2d57c809559f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019cc4aa-2e29-7de3-98d8-2d57c809559f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019cc4aa-2e29-7554-b0da-cd6765984625" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019cc4aa-2e29-7498-8a4d-f241affb31e7" xlink:to="loc_us-gaap_NoninterestExpense_019cc4aa-2e29-7554-b0da-cd6765984625" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2e29-76a0-8a3a-a781364b9073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7e09-b091-cd81e2556039" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cc4aa-2e29-76a0-8a3a-a781364b9073" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.northrim.com/role/SegmentInformationAssetsDetails" xlink:type="simple" xlink:href="nrim-20260331.xsd#SegmentInformationAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.northrim.com/role/SegmentInformationAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7af3-b587-e30040249fd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7af3-b587-e30040249fd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-74d2-853c-2db7748017ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7af3-b587-e30040249fd2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-74d2-853c-2db7748017ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-74d2-853c-2db7748017ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-74d2-853c-2db7748017ee" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-74d2-853c-2db7748017ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7e1a-bd77-240308d2217f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cc4aa-2e29-74d2-853c-2db7748017ee" xlink:to="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7e1a-bd77-240308d2217f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7578-893e-f21a315b7427" xlink:href="nrim-20260331.xsd#nrim_CommunityBankingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7e1a-bd77-240308d2217f" xlink:to="loc_nrim_CommunityBankingSegmentMember_019cc4aa-2e29-7578-893e-f21a315b7427" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-70ba-a620-42c430842b6d" xlink:href="nrim-20260331.xsd#nrim_HomeMortgageLendingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7e1a-bd77-240308d2217f" xlink:to="loc_nrim_HomeMortgageLendingSegmentMember_019cc4aa-2e29-70ba-a620-42c430842b6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-7efa-a946-ebe1efa2812a" xlink:href="nrim-20260331.xsd#nrim_SpecialtyFinanceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cc4aa-2e29-7e1a-bd77-240308d2217f" xlink:to="loc_nrim_SpecialtyFinanceSegmentMember_019cc4aa-2e29-7efa-a946-ebe1efa2812a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-79a3-843c-439a58831eb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc4aa-2e29-7af3-b587-e30040249fd2" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-79a3-843c-439a58831eb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-79a3-843c-439a58831eb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-79a3-843c-439a58831eb4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-79a3-843c-439a58831eb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7f84-9f1e-36c50427c645" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cc4aa-2e29-79a3-843c-439a58831eb4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7f84-9f1e-36c50427c645" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansMember_019dadc3-9a94-7e7f-b950-133e2f7899bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cc4aa-2e29-7f84-9f1e-36c50427c645" xlink:to="loc_us-gaap_LoansMember_019dadc3-9a94-7e7f-b950-133e2f7899bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cc4aa-2e29-74e9-ab36-db73a99325c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_Assets_019cc4aa-2e29-74e9-ab36-db73a99325c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_019cc4aa-2e29-7045-a8d1-855fde834471" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_019cc4aa-2e29-7045-a8d1-855fde834471" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7efc-82f1-5a6d7157b168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cc4aa-2e29-7efc-82f1-5a6d7157b168" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7d62-89cb-76258349777a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_AccountsReceivableNet_019cc4aa-2e29-7d62-89cb-76258349777a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cc4aa-2e29-71d0-b46c-e89e0070093d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cc4aa-2e29-7020-acbc-d8c6c9685d7d" xlink:to="loc_us-gaap_Goodwill_019cc4aa-2e29-71d0-b46c-e89e0070093d" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_Assets" xlink:type="arc" order="691"/>
  </link:definitionLink>
</link:linkbase>
