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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:466130e6-92d5-4ded-9421-53314d9f79b7,g:59221357-505b-4c4e-8d41-3253592119a5-->
<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.adp.com/role/StatementsofConsolidatedEarnings" xlink:type="simple" xlink:href="adp-20230331.xsd#StatementsofConsolidatedEarnings"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/StatementsofConsolidatedEarnings" xlink:type="extended" id="i24ab201536a64ca09444729689e85bec_StatementsofConsolidatedEarnings">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_c2bd096c-1ed9-4d98-ad83-7001b65d0cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_RevenuesAbstract_c2bd096c-1ed9-4d98-ad83-7001b65d0cb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2d8452d5-0bba-4e5a-a453-2c8f521a31f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c2bd096c-1ed9-4d98-ad83-7001b65d0cb7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2d8452d5-0bba-4e5a-a453-2c8f521a31f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_dd8e0006-5dec-468b-bab9-08a1ea5429a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_dd8e0006-5dec-468b-bab9-08a1ea5429a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_Systemsdevelopmentprogrammingcosts_5c9817a5-8557-4eb6-b461-114671e3a50a" xlink:href="adp-20230331.xsd#adp_Systemsdevelopmentprogrammingcosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:to="loc_adp_Systemsdevelopmentprogrammingcosts_5c9817a5-8557-4eb6-b461-114671e3a50a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_2f5951b9-c022-4fcd-b493-210329b8736e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_2f5951b9-c022-4fcd-b493-210329b8736e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_16022f1e-ea3d-441d-8a03-ec2b14d7e9b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_b77969b0-ebdf-485d-a165-a8e8f135e2a2" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_16022f1e-ea3d-441d-8a03-ec2b14d7e9b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_81613eda-75e8-4c26-a77e-8d7cd7a5f301" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_81613eda-75e8-4c26-a77e-8d7cd7a5f301" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_3ff896e6-13a3-4022-b6c4-c17674f9104e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:to="loc_us-gaap_InterestExpense_3ff896e6-13a3-4022-b6c4-c17674f9104e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_c5dd91cb-c807-4914-ae68-3229e0a2e1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_cea225e6-f625-4191-888a-8666c6009de6" xlink:to="loc_us-gaap_CostsAndExpenses_c5dd91cb-c807-4914-ae68-3229e0a2e1b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_92a0d14f-e25f-4519-a4f2-95ee499a679f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_92a0d14f-e25f-4519-a4f2-95ee499a679f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_21156c0b-ade0-4b21-8502-2c57508c1c94" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_21156c0b-ade0-4b21-8502-2c57508c1c94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_f22f0a53-751a-47ff-ae24-0000e6fb490d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_f22f0a53-751a-47ff-ae24-0000e6fb490d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_25010e96-029f-46bf-9919-b8aac48b11dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_NetIncomeLoss_25010e96-029f-46bf-9919-b8aac48b11dd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_7e6341e1-1840-4866-b6af-c5b8c0f08023" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:to="loc_us-gaap_EarningsPerShareBasic_7e6341e1-1840-4866-b6af-c5b8c0f08023" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_cbd3ce2e-582d-4840-a98d-700463b9ce33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:to="loc_us-gaap_EarningsPerShareDiluted_cbd3ce2e-582d-4840-a98d-700463b9ce33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a963df2b-054c-4e03-8980-54f3b7e3a352" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a963df2b-054c-4e03-8980-54f3b7e3a352" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b0e29961-80c8-4bec-967d-ab930a978a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_4aa147db-89ca-40bb-92a3-76faa202eba9" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b0e29961-80c8-4bec-967d-ab930a978a2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_00880a24-924c-4c88-9927-5872bd6e426b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_6169cfcd-12c6-440f-b7e9-b291cb5a2209" xlink:to="loc_us-gaap_StatementTable_00880a24-924c-4c88-9927-5872bd6e426b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_81a0371a-d36c-415c-9eff-efe85f6b76ba" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_00880a24-924c-4c88-9927-5872bd6e426b" xlink:to="loc_srt_ProductOrServiceAxis_81a0371a-d36c-415c-9eff-efe85f6b76ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_81a0371a-d36c-415c-9eff-efe85f6b76ba_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_81a0371a-d36c-415c-9eff-efe85f6b76ba" xlink:to="loc_srt_ProductsAndServicesDomain_81a0371a-d36c-415c-9eff-efe85f6b76ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_1c5a34ef-60ea-4799-9f1a-264c273868c2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_81a0371a-d36c-415c-9eff-efe85f6b76ba" xlink:to="loc_srt_ProductsAndServicesDomain_1c5a34ef-60ea-4799-9f1a-264c273868c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_RevenuesOtherThanInterestOnFundsHeldForClientsAndPEORevenuesMember_e2fb13df-0278-42c1-a2e3-69d4da4ed245" xlink:href="adp-20230331.xsd#adp_RevenuesOtherThanInterestOnFundsHeldForClientsAndPEORevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c5a34ef-60ea-4799-9f1a-264c273868c2" xlink:to="loc_adp_RevenuesOtherThanInterestOnFundsHeldForClientsAndPEORevenuesMember_e2fb13df-0278-42c1-a2e3-69d4da4ed245" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_InterestOnFundsHeldForClientsMember_4f50ffe5-978d-4a73-a385-9efe2e3049b2" xlink:href="adp-20230331.xsd#adp_InterestOnFundsHeldForClientsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c5a34ef-60ea-4799-9f1a-264c273868c2" xlink:to="loc_adp_InterestOnFundsHeldForClientsMember_4f50ffe5-978d-4a73-a385-9efe2e3049b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_PEORevenuesMember_3e928d7f-6bfd-4318-9803-747cd6914d90" xlink:href="adp-20230331.xsd#adp_PEORevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c5a34ef-60ea-4799-9f1a-264c273868c2" xlink:to="loc_adp_PEORevenuesMember_3e928d7f-6bfd-4318-9803-747cd6914d90" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#RevenueDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="extended" id="i42eb8117a6f34b448b9799e8f0025d5c_RevenueDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_07c53db1-5207-4664-afbd-0bc81e82314a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_42e9285d-6b53-4ccc-bf32-17ef20c0b779" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_07c53db1-5207-4664-afbd-0bc81e82314a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_42e9285d-6b53-4ccc-bf32-17ef20c0b779" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_30e894e1-c704-4594-aa4d-62ec7bc03d36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_07c53db1-5207-4664-afbd-0bc81e82314a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_30e894e1-c704-4594-aa4d-62ec7bc03d36" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_58c5bf08-799d-4944-9c0c-ab04d568107e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_30e894e1-c704-4594-aa4d-62ec7bc03d36" xlink:to="loc_srt_ProductOrServiceAxis_58c5bf08-799d-4944-9c0c-ab04d568107e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_58c5bf08-799d-4944-9c0c-ab04d568107e_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_58c5bf08-799d-4944-9c0c-ab04d568107e" xlink:to="loc_srt_ProductsAndServicesDomain_58c5bf08-799d-4944-9c0c-ab04d568107e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_58c5bf08-799d-4944-9c0c-ab04d568107e" xlink:to="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_HCMMember_cba215bf-f337-473f-928e-89343576cf5c" xlink:href="adp-20230331.xsd#adp_HCMMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:to="loc_adp_HCMMember_cba215bf-f337-473f-928e-89343576cf5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_HROMember_ea1f24b9-d36b-4640-b028-16dfa31bbfab" xlink:href="adp-20230331.xsd#adp_HROMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:to="loc_adp_HROMember_ea1f24b9-d36b-4640-b028-16dfa31bbfab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_PEOMember_5261e94d-10c5-4264-8941-488d3f9753d6" xlink:href="adp-20230331.xsd#adp_PEOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:to="loc_adp_PEOMember_5261e94d-10c5-4264-8941-488d3f9753d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_GlobalMember_c98c57cc-6373-4d33-a1fe-d7e5ee28d586" xlink:href="adp-20230331.xsd#adp_GlobalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:to="loc_adp_GlobalMember_c98c57cc-6373-4d33-a1fe-d7e5ee28d586" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ClientfundinterestMember_c0ae79f3-9336-431d-b084-737d83582e4a" xlink:href="adp-20230331.xsd#adp_ClientfundinterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_47ab0cce-5a7b-457f-aa7e-da8e5d4dea79" xlink:to="loc_adp_ClientfundinterestMember_c0ae79f3-9336-431d-b084-737d83582e4a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_6f3a6d0d-462e-4789-8caf-237498826af3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_30e894e1-c704-4594-aa4d-62ec7bc03d36" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_6f3a6d0d-462e-4789-8caf-237498826af3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6f3a6d0d-462e-4789-8caf-237498826af3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6f3a6d0d-462e-4789-8caf-237498826af3" xlink:to="loc_us-gaap_SegmentDomain_6f3a6d0d-462e-4789-8caf-237498826af3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0321dd95-0a5c-49a3-bbb8-fe22b3976590" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6f3a6d0d-462e-4789-8caf-237498826af3" xlink:to="loc_us-gaap_SegmentDomain_0321dd95-0a5c-49a3-bbb8-fe22b3976590" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_EmployerServicesSegmentMember_75a356d1-1a03-4e46-9311-8426421c6f46" xlink:href="adp-20230331.xsd#adp_EmployerServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0321dd95-0a5c-49a3-bbb8-fe22b3976590" xlink:to="loc_adp_EmployerServicesSegmentMember_75a356d1-1a03-4e46-9311-8426421c6f46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ProfessionalEmployeeOrganizationServicesSegmentMember_8ce7bd0b-2d70-4005-8cc4-56f606749f04" xlink:href="adp-20230331.xsd#adp_ProfessionalEmployeeOrganizationServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0321dd95-0a5c-49a3-bbb8-fe22b3976590" xlink:to="loc_adp_ProfessionalEmployeeOrganizationServicesSegmentMember_8ce7bd0b-2d70-4005-8cc4-56f606749f04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_9a470681-522d-400c-becf-d026c770fa33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0321dd95-0a5c-49a3-bbb8-fe22b3976590" xlink:to="loc_us-gaap_AllOtherSegmentsMember_9a470681-522d-400c-becf-d026c770fa33" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsCorporateInvestmentsAndFundsHeldForClientsDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#CorporateInvestmentsandFundsHeldForClientsCorporateInvestmentsAndFundsHeldForClientsDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsCorporateInvestmentsAndFundsHeldForClientsDetails" xlink:type="extended" id="i2409f72b589b4e2095626614d9054e6d_CorporateInvestmentsandFundsHeldForClientsCorporateInvestmentsAndFundsHeldForClientsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_a816f2f1-be9b-47ca-8240-8e518ddd1f76" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_a816f2f1-be9b-47ca-8240-8e518ddd1f76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1708f9f6-542b-4eb7-b238-2d636a887654" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1708f9f6-542b-4eb7-b238-2d636a887654" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_1630b1cd-7b27-4e2a-a49c-49f2f6c43797" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_1630b1cd-7b27-4e2a-a49c-49f2f6c43797" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_abfdf99f-43db-478f-b7a2-587af62d29ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_abfdf99f-43db-478f-b7a2-587af62d29ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_cf1fed77-1c93-4867-a903-3ea686f6509a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_cf1fed77-1c93-4867-a903-3ea686f6509a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0d35a1a0-f1e1-4136-be0f-441985599a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0d35a1a0-f1e1-4136-be0f-441985599a4a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsAmortizedCost_7f34ff10-55d7-48f4-8cab-024e09bae84e" xlink:href="adp-20230331.xsd#adp_TotalCorporateInvestmentsAndFundsHeldForClientsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsAmortizedCost_7f34ff10-55d7-48f4-8cab-024e09bae84e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedGains_82774c5a-1c7a-4815-a2af-1b9fab0bad53" xlink:href="adp-20230331.xsd#adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedGains"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedGains_82774c5a-1c7a-4815-a2af-1b9fab0bad53" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedLosses_b2cd95ec-7d53-4084-b239-107bdf0dc4bf" xlink:href="adp-20230331.xsd#adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsGrossUnrealizedLosses_b2cd95ec-7d53-4084-b239-107bdf0dc4bf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsFairValue_2da15ec0-9b44-4329-849e-13180d408b2a" xlink:href="adp-20230331.xsd#adp_TotalCorporateInvestmentsAndFundsHeldForClientsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_adp_TotalCorporateInvestmentsAndFundsHeldForClientsFairValue_2da15ec0-9b44-4329-849e-13180d408b2a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_99ee9db9-0189-430d-9c52-058366d0efb7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_870eeb8b-6546-4c65-a752-0c9ab9e09290" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_99ee9db9-0189-430d-9c52-058366d0efb7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_99ee9db9-0189-430d-9c52-058366d0efb7" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_6192833d-5e73-4d5b-a13c-4fb800a9871d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_51cf7a4b-5d57-4ef2-91ef-1f3ba746166e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_6192833d-5e73-4d5b-a13c-4fb800a9871d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_0bb880d1-1398-4acc-adc7-fe2d1d97c08e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_6192833d-5e73-4d5b-a13c-4fb800a9871d" xlink:to="loc_us-gaap_MoneyMarketFundsMember_0bb880d1-1398-4acc-adc7-fe2d1d97c08e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_862e5197-a032-4b45-b0da-3a0963921680" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_99ee9db9-0189-430d-9c52-058366d0efb7" xlink:to="loc_us-gaap_FinancialInstrumentAxis_862e5197-a032-4b45-b0da-3a0963921680" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_862e5197-a032-4b45-b0da-3a0963921680_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_862e5197-a032-4b45-b0da-3a0963921680" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_862e5197-a032-4b45-b0da-3a0963921680_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_862e5197-a032-4b45-b0da-3a0963921680" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_43491969-fc32-4831-9165-52363d554822" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_43491969-fc32-4831-9165-52363d554822" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_93790e87-2bef-4634-8464-6a7ee08c62ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_93790e87-2bef-4634-8464-6a7ee08c62ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_184d83e6-4e18-4c3b-bd4e-dee3a55a8c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_184d83e6-4e18-4c3b-bd4e-dee3a55a8c4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_073dbf15-be32-46cc-97ce-8db863757e61" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_073dbf15-be32-46cc-97ce-8db863757e61" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_8c82d984-871e-4da2-a876-b0f6dd2d9088" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_8c82d984-871e-4da2-a876-b0f6dd2d9088" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CanadianProvincialBondsMember_c341eece-f437-492d-a2e4-3ea6b2197470" xlink:href="adp-20230331.xsd#adp_CanadianProvincialBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_adp_CanadianProvincialBondsMember_c341eece-f437-492d-a2e4-3ea6b2197470" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_1a184b5d-d778-4d0c-899c-ac15ff35163d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_1a184b5d-d778-4d0c-899c-ac15ff35163d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_fe2e2f46-7d5c-4b98-9142-b33ad9c59971" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_fe2e2f46-7d5c-4b98-9142-b33ad9c59971" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CorporateInvestmentsMember_d59dc9fa-6a23-4b34-ae08-c6f50bc8d5bd" xlink:href="adp-20230331.xsd#adp_CorporateInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_adp_CorporateInvestmentsMember_d59dc9fa-6a23-4b34-ae08-c6f50bc8d5bd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_FundsHeldForClientsMember_8c475fff-ec57-44ed-b904-8bac663e4b67" xlink:href="adp-20230331.xsd#adp_FundsHeldForClientsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_37ed5fc3-d2ec-49df-93f0-77c10d82dd3e" xlink:to="loc_adp_FundsHeldForClientsMember_8c475fff-ec57-44ed-b904-8bac663e4b67" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsNarrativeDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#CorporateInvestmentsandFundsHeldForClientsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsNarrativeDetails" xlink:type="extended" id="i039ecbd533424500a0987e1cd6949055_CorporateInvestmentsandFundsHeldForClientsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_17ec9edd-eece-43b2-83e2-a66288c444af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_17ec9edd-eece-43b2-83e2-a66288c444af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ClientFundObligationRepaymentPeriod_182c92ec-593f-45d8-a61b-c62dfcacd44e" xlink:href="adp-20230331.xsd#adp_ClientFundObligationRepaymentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_adp_ClientFundObligationRepaymentPeriod_182c92ec-593f-45d8-a61b-c62dfcacd44e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ClientFundsObligations_f6dcf4b4-a7f6-4284-bed7-fe83ba38aec3" xlink:href="adp-20230331.xsd#adp_ClientFundsObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_adp_ClientFundsObligations_f6dcf4b4-a7f6-4284-bed7-fe83ba38aec3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ClientFundsHeldinGrantorTrust_56a8172a-90eb-4daa-95e1-063fc50585d9" xlink:href="adp-20230331.xsd#adp_ClientFundsHeldinGrantorTrust"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_adp_ClientFundsHeldinGrantorTrust_56a8172a-90eb-4daa-95e1-063fc50585d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ClientFundsInvestmentsOriginalMaturityPeriod_830d3caf-a271-43f5-99a2-db78cc4e9f4c" xlink:href="adp-20230331.xsd#adp_ClientFundsInvestmentsOriginalMaturityPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_adp_ClientFundsInvestmentsOriginalMaturityPeriod_830d3caf-a271-43f5-99a2-db78cc4e9f4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_01bc4342-ee62-46cb-8aef-ce01e70e19bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_aaf0dd2e-359d-4183-9551-a88406556ab0" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_01bc4342-ee62-46cb-8aef-ce01e70e19bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_01bc4342-ee62-46cb-8aef-ce01e70e19bd" xlink:to="loc_us-gaap_FinancialInstrumentAxis_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6166d95b-b9f6-4b7a-a6e1-b165ea5a817e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_AssetBackedAutoLoanReceivablesMember_ec48f917-5df5-4c09-94c7-57457a4a71be" xlink:href="adp-20230331.xsd#adp_AssetBackedAutoLoanReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_adp_AssetBackedAutoLoanReceivablesMember_ec48f917-5df5-4c09-94c7-57457a4a71be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_FixedRateCreditCardMember_a6369f40-a800-4197-a075-ad23268ce67c" xlink:href="adp-20230331.xsd#adp_FixedRateCreditCardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_adp_FixedRateCreditCardMember_a6369f40-a800-4197-a075-ad23268ce67c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_AssetBackedEquipmentLeaseReceivableMember_84f676a0-662c-4c22-9d0a-cf729fa550c0" xlink:href="adp-20230331.xsd#adp_AssetBackedEquipmentLeaseReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_adp_AssetBackedEquipmentLeaseReceivableMember_84f676a0-662c-4c22-9d0a-cf729fa550c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_FederalFarmCreditBanksMember_df2cf4f1-e74d-4d08-a954-0c73b85069ba" xlink:href="adp-20230331.xsd#adp_FederalFarmCreditBanksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_adp_FederalFarmCreditBanksMember_df2cf4f1-e74d-4d08-a954-0c73b85069ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalHomeLoanBankCertificatesAndObligationsFHLBMember_dda9ebaa-9af2-4f63-8a78-ad2d5e659022" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FederalHomeLoanBankCertificatesAndObligationsFHLBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_us-gaap_FederalHomeLoanBankCertificatesAndObligationsFHLBMember_dda9ebaa-9af2-4f63-8a78-ad2d5e659022" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_64f5574d-47b3-4c93-af07-ac118d78ac56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_64f5574d-47b3-4c93-af07-ac118d78ac56" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_2ce4efc1-8991-4ca2-84fd-df88f6b5bf29" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_us-gaap_MunicipalBondsMember_2ce4efc1-8991-4ca2-84fd-df88f6b5bf29" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_6847bd8e-b845-4b7e-858b-2bc932d775a7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_6847bd8e-b845-4b7e-858b-2bc932d775a7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_SupranationalBondsMember_5dea1d27-dc92-428d-97f4-708508e02b0b" xlink:href="adp-20230331.xsd#adp_SupranationalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4380c016-f257-4b1d-ba89-b04a30cde7c8" xlink:to="loc_adp_SupranationalBondsMember_5dea1d27-dc92-428d-97f4-708508e02b0b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f112fad-5004-4115-9e22-724d2f8f8697" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_01bc4342-ee62-46cb-8aef-ce01e70e19bd" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f112fad-5004-4115-9e22-724d2f8f8697" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1f112fad-5004-4115-9e22-724d2f8f8697_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f112fad-5004-4115-9e22-724d2f8f8697" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1f112fad-5004-4115-9e22-724d2f8f8697_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_903c8d08-d9c4-487a-9bab-7646e00fbe9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f112fad-5004-4115-9e22-724d2f8f8697" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_903c8d08-d9c4-487a-9bab-7646e00fbe9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_7b461774-389f-479e-9bdc-3e9e155b1000" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_903c8d08-d9c4-487a-9bab-7646e00fbe9d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_7b461774-389f-479e-9bdc-3e9e155b1000" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_07ebe065-d783-4b3f-b994-aed269655d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_903c8d08-d9c4-487a-9bab-7646e00fbe9d" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_07ebe065-d783-4b3f-b994-aed269655d4e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsAvailableForSaleSecuritiesThatHaveBeenInAnUnrealizedLossPositionDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#CorporateInvestmentsandFundsHeldForClientsAvailableForSaleSecuritiesThatHaveBeenInAnUnrealizedLossPositionDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsAvailableForSaleSecuritiesThatHaveBeenInAnUnrealizedLossPositionDetails" xlink:type="extended" id="i89524faa103343aa9733ce0848b798ca_CorporateInvestmentsandFundsHeldForClientsAvailableForSaleSecuritiesThatHaveBeenInAnUnrealizedLossPositionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_be26ae1d-582e-403b-9754-80b54c736a5e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_be26ae1d-582e-403b-9754-80b54c736a5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_1067a49c-1deb-4e26-9b46-839b3ad58845" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_1067a49c-1deb-4e26-9b46-839b3ad58845" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_89b4787b-5795-494d-bd53-997ac2f8f532" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_89b4787b-5795-494d-bd53-997ac2f8f532" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_6cf5d54c-29d4-474c-88da-0498686149c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_6cf5d54c-29d4-474c-88da-0498686149c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_67c3c120-2e62-4a94-874e-e9a00a1b41b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_67c3c120-2e62-4a94-874e-e9a00a1b41b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_7feee2e3-e2fa-405e-9f03-0378f5ba0aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_7feee2e3-e2fa-405e-9f03-0378f5ba0aaf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_ee4b1cd3-34dc-4060-93e3-c335c7d965c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_1a5f50c5-d6b1-4eb3-8a21-152710ea11f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_ee4b1cd3-34dc-4060-93e3-c335c7d965c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_73c86367-2cd7-4853-bf55-aa6ad5c6a409" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_ee4b1cd3-34dc-4060-93e3-c335c7d965c5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_73c86367-2cd7-4853-bf55-aa6ad5c6a409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_73c86367-2cd7-4853-bf55-aa6ad5c6a409_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_73c86367-2cd7-4853-bf55-aa6ad5c6a409" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_73c86367-2cd7-4853-bf55-aa6ad5c6a409_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_73c86367-2cd7-4853-bf55-aa6ad5c6a409" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_9f5eddbb-9d4c-45ae-b223-bccba7b9ff59" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_9f5eddbb-9d4c-45ae-b223-bccba7b9ff59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_db730491-0f86-4bef-a2da-6230e56edb6d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_db730491-0f86-4bef-a2da-6230e56edb6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_5fc01463-aaa4-4f70-8ee3-628802218525" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_5fc01463-aaa4-4f70-8ee3-628802218525" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_e5792fe9-bad0-4f0c-b7b3-f6e2ea4b2470" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_e5792fe9-bad0-4f0c-b7b3-f6e2ea4b2470" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_e7786036-3be0-444f-97f1-455dae7a9de1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_e7786036-3be0-444f-97f1-455dae7a9de1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CanadianProvincialBondsMember_1fe3f903-c21e-46f6-8133-74917d408e56" xlink:href="adp-20230331.xsd#adp_CanadianProvincialBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_adp_CanadianProvincialBondsMember_1fe3f903-c21e-46f6-8133-74917d408e56" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_2829f646-1f1e-48e3-b274-9bf2b3abab17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_2829f646-1f1e-48e3-b274-9bf2b3abab17" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_a5bfb509-676c-4d81-af70-10e73cd02e60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5433711-51fa-4fe4-93b4-6d72d298edae" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_a5bfb509-676c-4d81-af70-10e73cd02e60" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsScheduleOfInvestmentOfFundsHeldForClientsDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#CorporateInvestmentsandFundsHeldForClientsScheduleOfInvestmentOfFundsHeldForClientsDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/CorporateInvestmentsandFundsHeldForClientsScheduleOfInvestmentOfFundsHeldForClientsDetails" xlink:type="extended" id="i87045257d898441da9f0f467f05c159b_CorporateInvestmentsandFundsHeldForClientsScheduleOfInvestmentOfFundsHeldForClientsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_df5cd09e-babd-419e-b297-bf7dd19c7c70" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_bf2392d2-5765-490c-9cff-42b1b3fd9c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_df5cd09e-babd-419e-b297-bf7dd19c7c70" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_bf2392d2-5765-490c-9cff-42b1b3fd9c7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_32da617b-bf51-4da3-ac9c-05a3f3bb71cc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleRestricted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_df5cd09e-babd-419e-b297-bf7dd19c7c70" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_32da617b-bf51-4da3-ac9c-05a3f3bb71cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_TotalFundsHeldToSatisfyClientFundObligationAtCarryingValue_9f2c4195-c802-4a3a-8efa-a24beaea5ede" xlink:href="adp-20230331.xsd#adp_TotalFundsHeldToSatisfyClientFundObligationAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_df5cd09e-babd-419e-b297-bf7dd19c7c70" xlink:to="loc_adp_TotalFundsHeldToSatisfyClientFundObligationAtCarryingValue_9f2c4195-c802-4a3a-8efa-a24beaea5ede" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_50dfa1f1-8cd8-4731-ab01-c34b851c7b16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_df5cd09e-babd-419e-b297-bf7dd19c7c70" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_50dfa1f1-8cd8-4731-ab01-c34b851c7b16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_AccountClassificationAxis_30d48528-5e21-43a3-aff0-ddbdc6a037f8" xlink:href="adp-20230331.xsd#adp_AccountClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_50dfa1f1-8cd8-4731-ab01-c34b851c7b16" xlink:to="loc_adp_AccountClassificationAxis_30d48528-5e21-43a3-aff0-ddbdc6a037f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_AccountClassificationDomain_30d48528-5e21-43a3-aff0-ddbdc6a037f8_default" xlink:href="adp-20230331.xsd#adp_AccountClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_adp_AccountClassificationAxis_30d48528-5e21-43a3-aff0-ddbdc6a037f8" xlink:to="loc_adp_AccountClassificationDomain_30d48528-5e21-43a3-aff0-ddbdc6a037f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_AccountClassificationDomain_1f0f4159-199d-4345-8495-c69d5118cd3c" xlink:href="adp-20230331.xsd#adp_AccountClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_adp_AccountClassificationAxis_30d48528-5e21-43a3-aff0-ddbdc6a037f8" xlink:to="loc_adp_AccountClassificationDomain_1f0f4159-199d-4345-8495-c69d5118cd3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CurrentMember_c5d7a675-55c1-439f-bb96-441d42d5f586" xlink:href="adp-20230331.xsd#adp_CurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_adp_AccountClassificationDomain_1f0f4159-199d-4345-8495-c69d5118cd3c" xlink:to="loc_adp_CurrentMember_c5d7a675-55c1-439f-bb96-441d42d5f586" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_NoncurrentMember_723a3d66-506f-48d7-913d-aacd43a9b8ae" xlink:href="adp-20230331.xsd#adp_NoncurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_adp_AccountClassificationDomain_1f0f4159-199d-4345-8495-c69d5118cd3c" xlink:to="loc_adp_NoncurrentMember_723a3d66-506f-48d7-913d-aacd43a9b8ae" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/GoodwillandIntangibleAssetsnetChangesInGoodwillDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#GoodwillandIntangibleAssetsnetChangesInGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/GoodwillandIntangibleAssetsnetChangesInGoodwillDetails" xlink:type="extended" id="i538a19bf94eb48f6a7a44417118e2565_GoodwillandIntangibleAssetsnetChangesInGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_dab945db-3ca5-4c13-ab0e-b0c6ec2cd8a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_1cfb4f50-ebdf-41cb-a631-d1ca0aa16e86" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_dab945db-3ca5-4c13-ab0e-b0c6ec2cd8a4" xlink:to="loc_us-gaap_GoodwillRollForward_1cfb4f50-ebdf-41cb-a631-d1ca0aa16e86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_25df5cc5-288f-45ac-b4e7-61f52b7549e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1cfb4f50-ebdf-41cb-a631-d1ca0aa16e86" xlink:to="loc_us-gaap_Goodwill_25df5cc5-288f-45ac-b4e7-61f52b7549e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillOtherIncreaseDecrease_2ffc148c-85c8-4e46-9a19-4a3e5e511ba3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillOtherIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1cfb4f50-ebdf-41cb-a631-d1ca0aa16e86" xlink:to="loc_us-gaap_GoodwillOtherIncreaseDecrease_2ffc148c-85c8-4e46-9a19-4a3e5e511ba3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_3dc8bff9-b830-4cd0-b60a-4534b1181242" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1cfb4f50-ebdf-41cb-a631-d1ca0aa16e86" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_3dc8bff9-b830-4cd0-b60a-4534b1181242" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_d16c35c0-8303-4067-ae01-b2df5be98bbe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_1d47925f-5d1c-4dd9-ab06-5dd646c250f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_dab945db-3ca5-4c13-ab0e-b0c6ec2cd8a4" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_1d47925f-5d1c-4dd9-ab06-5dd646c250f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_db6e9ef3-9f18-416f-9ab2-a4e219e9d948" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_1d47925f-5d1c-4dd9-ab06-5dd646c250f7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_db6e9ef3-9f18-416f-9ab2-a4e219e9d948" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_db6e9ef3-9f18-416f-9ab2-a4e219e9d948_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_db6e9ef3-9f18-416f-9ab2-a4e219e9d948" xlink:to="loc_us-gaap_SegmentDomain_db6e9ef3-9f18-416f-9ab2-a4e219e9d948_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7eb951bd-31eb-46f5-ab52-cd6c3e916be7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_db6e9ef3-9f18-416f-9ab2-a4e219e9d948" xlink:to="loc_us-gaap_SegmentDomain_7eb951bd-31eb-46f5-ab52-cd6c3e916be7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_EmployerServicesSegmentMember_1f9c9a1b-80ec-4ee0-b445-d499af347c31" xlink:href="adp-20230331.xsd#adp_EmployerServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7eb951bd-31eb-46f5-ab52-cd6c3e916be7" xlink:to="loc_adp_EmployerServicesSegmentMember_1f9c9a1b-80ec-4ee0-b445-d499af347c31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_PeoServicesSegmentMember_c277fb02-7f30-4d32-86fb-9e2a8ebab44c" xlink:href="adp-20230331.xsd#adp_PeoServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7eb951bd-31eb-46f5-ab52-cd6c3e916be7" xlink:to="loc_adp_PeoServicesSegmentMember_c277fb02-7f30-4d32-86fb-9e2a8ebab44c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/GoodwillandIntangibleAssetsnetComponentsOfFiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#GoodwillandIntangibleAssetsnetComponentsOfFiniteLivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/GoodwillandIntangibleAssetsnetComponentsOfFiniteLivedIntangibleAssetsDetails" xlink:type="extended" id="iffc1eba641724ebe820439a57aad08e2_GoodwillandIntangibleAssetsnetComponentsOfFiniteLivedIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_6da6913f-d4bd-4de1-b671-09aff917571e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_fb199c68-07ff-4bb1-b92a-ed20a1ebbe35" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_6da6913f-d4bd-4de1-b671-09aff917571e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_fb199c68-07ff-4bb1-b92a-ed20a1ebbe35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_5a952f14-459d-45ed-b0cc-aa4ee1658d7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_6da6913f-d4bd-4de1-b671-09aff917571e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_5a952f14-459d-45ed-b0cc-aa4ee1658d7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_93049edc-24f8-4abd-bd53-0180afc81898" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_6da6913f-d4bd-4de1-b671-09aff917571e" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_93049edc-24f8-4abd-bd53-0180afc81898" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ef8af0ae-c962-4121-a913-e98a013d74ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_6da6913f-d4bd-4de1-b671-09aff917571e" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ef8af0ae-c962-4121-a913-e98a013d74ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6fbc7982-1065-4d1f-8074-d2c74c79879b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ef8af0ae-c962-4121-a913-e98a013d74ca" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6fbc7982-1065-4d1f-8074-d2c74c79879b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6fbc7982-1065-4d1f-8074-d2c74c79879b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6fbc7982-1065-4d1f-8074-d2c74c79879b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6fbc7982-1065-4d1f-8074-d2c74c79879b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9068343e-ef6c-4a9c-9d38-e94e54284814" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6fbc7982-1065-4d1f-8074-d2c74c79879b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9068343e-ef6c-4a9c-9d38-e94e54284814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_539891be-b885-4607-b782-09b808639f98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9068343e-ef6c-4a9c-9d38-e94e54284814" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_539891be-b885-4607-b782-09b808639f98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerListsMember_360682f9-8590-49d2-9636-7ef39ea9f05d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerListsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9068343e-ef6c-4a9c-9d38-e94e54284814" xlink:to="loc_us-gaap_CustomerListsMember_360682f9-8590-49d2-9636-7ef39ea9f05d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_7e1d38b6-556b-43d9-9eb5-605c32337391" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9068343e-ef6c-4a9c-9d38-e94e54284814" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_7e1d38b6-556b-43d9-9eb5-605c32337391" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#GoodwillandIntangibleAssetsnetNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/GoodwillandIntangibleAssetsnetNarrativeDetails" xlink:type="extended" id="id66de67e8385454cb1010608deb14b53_GoodwillandIntangibleAssetsnetNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e7ff4a3f-2422-4aac-bc65-8d774ae32e46" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_4789768a-1a38-499b-bb93-38e9be0ddf7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e7ff4a3f-2422-4aac-bc65-8d774ae32e46" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_4789768a-1a38-499b-bb93-38e9be0ddf7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_876eb9cd-9c9c-4ad7-af70-9518eeab6806" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e7ff4a3f-2422-4aac-bc65-8d774ae32e46" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_876eb9cd-9c9c-4ad7-af70-9518eeab6806" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_5c08ca07-8a48-44bc-a633-a2f20454f00b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e7ff4a3f-2422-4aac-bc65-8d774ae32e46" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_5c08ca07-8a48-44bc-a633-a2f20454f00b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3e419c41-53db-44ab-ae4c-235e4725a1ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_5c08ca07-8a48-44bc-a633-a2f20454f00b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3e419c41-53db-44ab-ae4c-235e4725a1ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3e419c41-53db-44ab-ae4c-235e4725a1ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3e419c41-53db-44ab-ae4c-235e4725a1ea" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3e419c41-53db-44ab-ae4c-235e4725a1ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c4954533-95a8-4b9b-9410-a7e374628e56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3e419c41-53db-44ab-ae4c-235e4725a1ea" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c4954533-95a8-4b9b-9410-a7e374628e56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_51f5df2f-e5f7-4f15-9940-bd2ed7f75601" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c4954533-95a8-4b9b-9410-a7e374628e56" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_51f5df2f-e5f7-4f15-9940-bd2ed7f75601" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerListsMember_82c8b1f7-5552-4e8f-a831-c1d762e9effe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerListsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c4954533-95a8-4b9b-9410-a7e374628e56" xlink:to="loc_us-gaap_CustomerListsMember_82c8b1f7-5552-4e8f-a831-c1d762e9effe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_b12f2cd3-3db3-4a59-8299-eb09e892afce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c4954533-95a8-4b9b-9410-a7e374628e56" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_b12f2cd3-3db3-4a59-8299-eb09e892afce" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/ShorttermFinancingNarrativeDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#ShorttermFinancingNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/ShorttermFinancingNarrativeDetails" xlink:type="extended" id="ib3f93ca992d944769bd4c01c573b8509_ShorttermFinancingNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e69e60df-9851-4478-823f-e9ff4c5e25dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e69e60df-9851-4478-823f-e9ff4c5e25dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_LineOfCreditFacilityTermOfCredit_af19de7d-289e-4c3c-831d-97eeb3c38503" xlink:href="adp-20230331.xsd#adp_LineOfCreditFacilityTermOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_adp_LineOfCreditFacilityTermOfCredit_af19de7d-289e-4c3c-831d-97eeb3c38503" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_DebtInstrumentExtensionOptionTerm_abdcebde-0c91-4de9-ab75-d7d6df1fb827" xlink:href="adp-20230331.xsd#adp_DebtInstrumentExtensionOptionTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_adp_DebtInstrumentExtensionOptionTerm_abdcebde-0c91-4de9-ab75-d7d6df1fb827" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_LineOfCreditFacilityPotentiallyAvailableIncreaseInMaximumBorrowingCapacity_05ac18fc-5915-46a4-b92f-5bd558167dde" xlink:href="adp-20230331.xsd#adp_LineOfCreditFacilityPotentiallyAvailableIncreaseInMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_adp_LineOfCreditFacilityPotentiallyAvailableIncreaseInMaximumBorrowingCapacity_05ac18fc-5915-46a4-b92f-5bd558167dde" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_41d24cf7-14f2-462f-b76e-fe5d250e2a83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_41d24cf7-14f2-462f-b76e-fe5d250e2a83" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_68213717-9a77-409f-b577-0f74e1399f17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_us-gaap_DebtInstrumentTerm_68213717-9a77-409f-b577-0f74e1399f17" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_83c33a62-7239-4b51-8436-ac480df15f37" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaper"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_us-gaap_CommercialPaper_83c33a62-7239-4b51-8436-ac480df15f37" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ObligationsUnderReverseRepurchaseAgreementsLongTerm_c25fc7f9-cec2-4536-ae42-df889b45e658" xlink:href="adp-20230331.xsd#adp_ObligationsUnderReverseRepurchaseAgreementsLongTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_adp_ObligationsUnderReverseRepurchaseAgreementsLongTerm_c25fc7f9-cec2-4536-ae42-df889b45e658" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_6c4a42a6-4119-4bba-b9a1-75f54586766d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_d4a99463-f391-4bfe-a7fc-9f456f01e749" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_6c4a42a6-4119-4bba-b9a1-75f54586766d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_457177ff-643a-476d-bd84-1840deda25e3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_6c4a42a6-4119-4bba-b9a1-75f54586766d" xlink:to="loc_us-gaap_DebtInstrumentAxis_457177ff-643a-476d-bd84-1840deda25e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_457177ff-643a-476d-bd84-1840deda25e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_457177ff-643a-476d-bd84-1840deda25e3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_457177ff-643a-476d-bd84-1840deda25e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_457177ff-643a-476d-bd84-1840deda25e3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ThreeHundredAndSixtyFourDayCreditFacilityMember_6a0746d6-62ad-4f65-9951-a257e6df48c5" xlink:href="adp-20230331.xsd#adp_ThreeHundredAndSixtyFourDayCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:to="loc_adp_ThreeHundredAndSixtyFourDayCreditFacilityMember_6a0746d6-62ad-4f65-9951-a257e6df48c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CreditFacilityExpiringInJuneTwoThousandTwentyFourMember_fdb1c8c0-f674-481f-a6c5-eced80ef6370" xlink:href="adp-20230331.xsd#adp_CreditFacilityExpiringInJuneTwoThousandTwentyFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:to="loc_adp_CreditFacilityExpiringInJuneTwoThousandTwentyFourMember_fdb1c8c0-f674-481f-a6c5-eced80ef6370" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CreditFacilityExpiringInJuneTwoThousandTwentySixMember_e14839e2-d01c-4ce7-a674-1e83120a4407" xlink:href="adp-20230331.xsd#adp_CreditFacilityExpiringInJuneTwoThousandTwentySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:to="loc_adp_CreditFacilityExpiringInJuneTwoThousandTwentySixMember_e14839e2-d01c-4ce7-a674-1e83120a4407" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_441f58c2-bdf7-4e2f-946c-3b0d1c0900ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:to="loc_us-gaap_CommercialPaperMember_441f58c2-bdf7-4e2f-946c-3b0d1c0900ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ReverseRepurchaseAgreementsMember_70bead98-60a6-431d-8a5a-badcdeffb349" xlink:href="adp-20230331.xsd#adp_ReverseRepurchaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4167ec2e-2597-4dc1-aa27-8d336a04a5b0" xlink:to="loc_adp_ReverseRepurchaseAgreementsMember_70bead98-60a6-431d-8a5a-badcdeffb349" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_80597dd5-94de-4bef-8577-f6470554e379" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_6c4a42a6-4119-4bba-b9a1-75f54586766d" xlink:to="loc_srt_RangeAxis_80597dd5-94de-4bef-8577-f6470554e379" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_80597dd5-94de-4bef-8577-f6470554e379_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_80597dd5-94de-4bef-8577-f6470554e379" xlink:to="loc_srt_RangeMember_80597dd5-94de-4bef-8577-f6470554e379_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5dfbf904-d12f-4fe7-83de-2268e9d30a41" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_80597dd5-94de-4bef-8577-f6470554e379" xlink:to="loc_srt_RangeMember_5dfbf904-d12f-4fe7-83de-2268e9d30a41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3aa12b41-b44b-41c0-9725-55846051e8ee" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5dfbf904-d12f-4fe7-83de-2268e9d30a41" xlink:to="loc_srt_MaximumMember_3aa12b41-b44b-41c0-9725-55846051e8ee" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/ShorttermFinancingCommercialPaperProgramandReverseRepurchaseAgreementsDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#ShorttermFinancingCommercialPaperProgramandReverseRepurchaseAgreementsDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/ShorttermFinancingCommercialPaperProgramandReverseRepurchaseAgreementsDetails" xlink:type="extended" id="i638991f28a2146aba28d33b2870d9561_ShorttermFinancingCommercialPaperProgramandReverseRepurchaseAgreementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_9490037e-da52-4c0a-9b7d-fdb97f776aca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShorttermDebtAverageOutstandingAmount_091114fd-3161-4530-9add-889ffbad0560" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShorttermDebtAverageOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9490037e-da52-4c0a-9b7d-fdb97f776aca" xlink:to="loc_us-gaap_ShorttermDebtAverageOutstandingAmount_091114fd-3161-4530-9add-889ffbad0560" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_c149b80a-d8fb-4ee1-96a9-e03c147dbceb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9490037e-da52-4c0a-9b7d-fdb97f776aca" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_c149b80a-d8fb-4ee1-96a9-e03c147dbceb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_CommercialPaperWeightAverageMaturity_91090fcc-c293-41d1-952a-f38e81e397a5" xlink:href="adp-20230331.xsd#adp_CommercialPaperWeightAverageMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9490037e-da52-4c0a-9b7d-fdb97f776aca" xlink:to="loc_adp_CommercialPaperWeightAverageMaturity_91090fcc-c293-41d1-952a-f38e81e397a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_11cda144-8a76-42ed-a8e0-43fa567446d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9490037e-da52-4c0a-9b7d-fdb97f776aca" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_11cda144-8a76-42ed-a8e0-43fa567446d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_11cda144-8a76-42ed-a8e0-43fa567446d8" xlink:to="loc_us-gaap_DebtInstrumentAxis_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a86be4ec-d7ea-4c2f-a8cf-f4ea45ee9d4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_6e8f0a8a-4616-4c1f-be01-e6f1cae1ff29" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a86be4ec-d7ea-4c2f-a8cf-f4ea45ee9d4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_66b17602-0679-4eca-bd17-1b901c4d1bd3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a86be4ec-d7ea-4c2f-a8cf-f4ea45ee9d4b" xlink:to="loc_us-gaap_CommercialPaperMember_66b17602-0679-4eca-bd17-1b901c4d1bd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ReverseRepurchaseAgreementsMember_12ac2422-a3ab-43ef-bb43-16ca14eb44aa" xlink:href="adp-20230331.xsd#adp_ReverseRepurchaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a86be4ec-d7ea-4c2f-a8cf-f4ea45ee9d4b" xlink:to="loc_adp_ReverseRepurchaseAgreementsMember_12ac2422-a3ab-43ef-bb43-16ca14eb44aa" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/DebtNarrativeDetails" xlink:type="extended" id="i287e70a6e15c4060991169f87f1ed599_DebtNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_50767394-26fd-4014-9df6-24deea126725" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_0657902d-e111-477e-a93e-712215614856" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_50767394-26fd-4014-9df6-24deea126725" xlink:to="loc_us-gaap_DebtInstrumentTerm_0657902d-e111-477e-a93e-712215614856" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_95bc16d9-0363-48de-8f98-e47cbc8a476c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_50767394-26fd-4014-9df6-24deea126725" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_95bc16d9-0363-48de-8f98-e47cbc8a476c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_581a04ba-4bba-4100-9e64-74e8751530ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_50767394-26fd-4014-9df6-24deea126725" xlink:to="loc_us-gaap_LongTermDebtFairValue_581a04ba-4bba-4100-9e64-74e8751530ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_91648f04-ce37-4e41-81e2-90caf1ed059a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_50767394-26fd-4014-9df6-24deea126725" xlink:to="loc_us-gaap_DebtInstrumentTable_91648f04-ce37-4e41-81e2-90caf1ed059a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_91648f04-ce37-4e41-81e2-90caf1ed059a" xlink:to="loc_us-gaap_DebtInstrumentAxis_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_834e91ab-3c18-4448-99df-1c609f1f153d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_cc206b3c-f5e2-4472-b0d5-c8a3226b64ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_834e91ab-3c18-4448-99df-1c609f1f153d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_NotesDueOn2028Member_b9678b34-9e4f-4e4c-90d5-c6523dec219c" xlink:href="adp-20230331.xsd#adp_NotesDueOn2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_834e91ab-3c18-4448-99df-1c609f1f153d" xlink:to="loc_adp_NotesDueOn2028Member_b9678b34-9e4f-4e4c-90d5-c6523dec219c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_NotesDueOn2025An2030Member_c2a8d3b3-a0f6-43a7-99c9-7ce64eeaa004" xlink:href="adp-20230331.xsd#adp_NotesDueOn2025An2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_834e91ab-3c18-4448-99df-1c609f1f153d" xlink:to="loc_adp_NotesDueOn2025An2030Member_c2a8d3b3-a0f6-43a7-99c9-7ce64eeaa004" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/DebtDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#DebtDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/DebtDetails" xlink:type="extended" id="ifc8d4133903047f6a729d28d213792af_DebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_268d7f7d-7e24-487c-ac47-332ac8aeeb23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_268d7f7d-7e24-487c-ac47-332ac8aeeb23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_3643b2a3-4013-43fc-80f9-9eae0e5aad5a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_3643b2a3-4013-43fc-80f9-9eae0e5aad5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayable_b618da94-a16c-4e9f-b469-fa82d7e441f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_NotesPayable_b618da94-a16c-4e9f-b469-fa82d7e441f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_37798f92-5a7b-4005-a654-cd650427ac14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_DebtCurrent_37798f92-5a7b-4005-a654-cd650427ac14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_469f51d4-7daf-40f9-ab84-5efbe86ee5a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_469f51d4-7daf-40f9-ab84-5efbe86ee5a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_7e0d7f08-d6b0-4d3b-96f0-ae63544269e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_7e0d7f08-d6b0-4d3b-96f0-ae63544269e8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_620d7d57-f89f-40ba-980b-b334e361350b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_07f85917-8f52-4cf6-8f93-c48d7494201e" xlink:to="loc_us-gaap_DebtInstrumentTable_620d7d57-f89f-40ba-980b-b334e361350b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_620d7d57-f89f-40ba-980b-b334e361350b" xlink:to="loc_us-gaap_DebtInstrumentAxis_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4c3b9b41-9c91-4ea8-8d1c-98cac53325dd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_Notesdueon2025Member_e8435b05-9487-4a5f-999a-80a3c64c66ca" xlink:href="adp-20230331.xsd#adp_Notesdueon2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:to="loc_adp_Notesdueon2025Member_e8435b05-9487-4a5f-999a-80a3c64c66ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_NotesDueOn2030Member_75478539-a6f5-4d2b-9f1a-f2cd1482155d" xlink:href="adp-20230331.xsd#adp_NotesDueOn2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:to="loc_adp_NotesDueOn2030Member_75478539-a6f5-4d2b-9f1a-f2cd1482155d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_NotesDueOn2028Member_d564b2a3-69be-430d-96c1-1b7e566873d6" xlink:href="adp-20230331.xsd#adp_NotesDueOn2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:to="loc_adp_NotesDueOn2028Member_d564b2a3-69be-430d-96c1-1b7e566873d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_96c45c18-5def-421a-8263-d884e5b99d78" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a6996ab3-f4b8-40e1-acec-8d09ac1f25f1" xlink:to="loc_us-gaap_OtherDebtSecuritiesMember_96c45c18-5def-421a-8263-d884e5b99d78" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/EmployeeBenefitPlansComponentsOfStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#EmployeeBenefitPlansComponentsOfStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/EmployeeBenefitPlansComponentsOfStockBasedCompensationExpenseDetails" xlink:type="extended" id="ie4160b368d7a4945ab02875e42e51b5c_EmployeeBenefitPlansComponentsOfStockBasedCompensationExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4114f8f1-83b2-4cc4-8965-15d94818520c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_505a0a62-6939-45ec-a305-82198fd94238" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4114f8f1-83b2-4cc4-8965-15d94818520c" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_505a0a62-6939-45ec-a305-82198fd94238" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_55660601-c08e-4660-acb5-96828ede1614" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4114f8f1-83b2-4cc4-8965-15d94818520c" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_55660601-c08e-4660-acb5-96828ede1614" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_03a60847-b0bf-410e-b7fd-4e32039d56f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_55660601-c08e-4660-acb5-96828ede1614" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_03a60847-b0bf-410e-b7fd-4e32039d56f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_03a60847-b0bf-410e-b7fd-4e32039d56f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_03a60847-b0bf-410e-b7fd-4e32039d56f5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_03a60847-b0bf-410e-b7fd-4e32039d56f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_f0509ff4-1227-46bd-8abb-675e5e4a4443" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_03a60847-b0bf-410e-b7fd-4e32039d56f5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_f0509ff4-1227-46bd-8abb-675e5e4a4443" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_OperatingExpensesMember_afcdc338-5286-43d7-a4ee-cbe34c593f04" xlink:href="adp-20230331.xsd#adp_OperatingExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_f0509ff4-1227-46bd-8abb-675e5e4a4443" xlink:to="loc_adp_OperatingExpensesMember_afcdc338-5286-43d7-a4ee-cbe34c593f04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_455a39d1-367d-4f98-95c8-67c585e9624e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_f0509ff4-1227-46bd-8abb-675e5e4a4443" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_455a39d1-367d-4f98-95c8-67c585e9624e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_SystemDevelopmentAndProgrammingCostsMember_2fe45dc0-58fa-4df7-8934-1891c34dff40" xlink:href="adp-20230331.xsd#adp_SystemDevelopmentAndProgrammingCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_f0509ff4-1227-46bd-8abb-675e5e4a4443" xlink:to="loc_adp_SystemDevelopmentAndProgrammingCostsMember_2fe45dc0-58fa-4df7-8934-1891c34dff40" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#StockholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/StockholdersEquityDetails" xlink:type="extended" id="i335fb3e2c94d444a9be24f4fffe2af1e_StockholdersEquityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_b0a2497a-3ae0-4c21-ab51-f8d67c651ce7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b0a2497a-3ae0-4c21-ab51-f8d67c651ce7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ffc6320e-0895-47e2-a5a3-71ae4e822a53" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_StockholdersEquity_ffc6320e-0895-47e2-a5a3-71ae4e822a53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_7cf56cfc-639e-4748-b3e5-e1fd4afa0c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_NetIncomeLoss_7cf56cfc-639e-4748-b3e5-e1fd4afa0c1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_153b97fa-0b67-4eb9-88b9-8f4650477033" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_153b97fa-0b67-4eb9-88b9-8f4650477033" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_StockBasedCompensationExpenseinEquity_af0fe277-9593-455d-9a6a-232f4aaf9c85" xlink:href="adp-20230331.xsd#adp_StockBasedCompensationExpenseinEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_adp_StockBasedCompensationExpenseinEquity_af0fe277-9593-455d-9a6a-232f4aaf9c85" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_27abf92a-0824-4fb1-a602-6bd2cfe3658e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_27abf92a-0824-4fb1-a602-6bd2cfe3658e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_78634c78-03ff-4925-9596-ba0a81ea5680" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_78634c78-03ff-4925-9596-ba0a81ea5680" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_bc311a55-a49c-4037-a996-7b128923eb95" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_bc311a55-a49c-4037-a996-7b128923eb95" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsStock_29141002-0493-4db4-a95d-0c3efc0c2947" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendsStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_DividendsStock_29141002-0493-4db4-a95d-0c3efc0c2947" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_31296ded-fa44-4f1b-8f89-22bca4943458" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_46e6eed4-21ee-47d9-8a89-73f3c11f5761" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_31296ded-fa44-4f1b-8f89-22bca4943458" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d62a7eb6-23db-406c-8287-c6be8b2f58ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a8207baa-eec7-48d2-9200-a1a769aeae0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_b0a2497a-3ae0-4c21-ab51-f8d67c651ce7" xlink:to="loc_us-gaap_StatementTable_a8207baa-eec7-48d2-9200-a1a769aeae0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a8207baa-eec7-48d2-9200-a1a769aeae0a" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8" xlink:to="loc_us-gaap_EquityComponentDomain_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_faf0197e-2d9b-4e67-857f-ccc6d85b1ea8" xlink:to="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e66f30a2-8aac-4617-a121-112fc2200b26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:to="loc_us-gaap_CommonStockMember_e66f30a2-8aac-4617-a121-112fc2200b26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_9ee574bd-0d4f-48e3-b044-5750a1901441" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_9ee574bd-0d4f-48e3-b044-5750a1901441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_d798d490-6921-422b-895c-821abf0478a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:to="loc_us-gaap_RetainedEarningsMember_d798d490-6921-422b-895c-821abf0478a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_de15b498-e17d-40b9-b912-4b7462908af0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:to="loc_us-gaap_TreasuryStockCommonMember_de15b498-e17d-40b9-b912-4b7462908af0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_d6acbddc-9305-4252-a969-d29de9e293db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ead0afc3-31b4-48e4-86b6-e79a280729e9" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_d6acbddc-9305-4252-a969-d29de9e293db" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/ReclassificationsoutofAccumulatedOtherComprehensiveIncomeAOCIDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#ReclassificationsoutofAccumulatedOtherComprehensiveIncomeAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/ReclassificationsoutofAccumulatedOtherComprehensiveIncomeAOCIDetails" xlink:type="extended" id="idb7b22441eab49019704355f1550275d_ReclassificationsoutofAccumulatedOtherComprehensiveIncomeAOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_69998e6d-8e21-4cdd-b7e7-98793f9218e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_69998e6d-8e21-4cdd-b7e7-98793f9218e1" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c378f07e-28db-4201-878e-ad45d6346bdc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:to="loc_us-gaap_StockholdersEquity_c378f07e-28db-4201-878e-ad45d6346bdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_9f4b2fb2-fcb0-44e9-8fa4-e92c3cb871ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_9f4b2fb2-fcb0-44e9-8fa4-e92c3cb871ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_f5bd791e-f305-4736-a156-9287ab9d0249" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_f5bd791e-f305-4736-a156-9287ab9d0249" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_e7aaa19b-f7da-4dae-8d31-be1b48cf8d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_e7aaa19b-f7da-4dae-8d31-be1b48cf8d7e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_e7b2dafc-41f7-4f8a-aca2-cfb6bcfaf55a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a7a3a7f6-2670-4ce2-9c4e-bf069e459ddd" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_e7b2dafc-41f7-4f8a-aca2-cfb6bcfaf55a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_35f01e28-cab5-452d-bf51-504c36a80b8f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_944512e4-e4a2-400d-ba55-9cbaa988b7e3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_69998e6d-8e21-4cdd-b7e7-98793f9218e1" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_944512e4-e4a2-400d-ba55-9cbaa988b7e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_998b9a48-684b-4ed8-be68-ee09fd8fe8db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_944512e4-e4a2-400d-ba55-9cbaa988b7e3" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_998b9a48-684b-4ed8-be68-ee09fd8fe8db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_998b9a48-684b-4ed8-be68-ee09fd8fe8db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_998b9a48-684b-4ed8-be68-ee09fd8fe8db" xlink:to="loc_us-gaap_EquityComponentDomain_998b9a48-684b-4ed8-be68-ee09fd8fe8db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a9b13f45-56e8-4798-8290-589436e88bee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_998b9a48-684b-4ed8-be68-ee09fd8fe8db" xlink:to="loc_us-gaap_EquityComponentDomain_a9b13f45-56e8-4798-8290-589436e88bee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a9b13f45-56e8-4798-8290-589436e88bee" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_30aa9876-6951-47e7-a2ba-4797549f50a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_30aa9876-6951-47e7-a2ba-4797549f50a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e0b896eb-c244-44e8-9cf5-984983b2fb4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e0b896eb-c244-44e8-9cf5-984983b2fb4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_18231c64-4bdb-463d-b161-85bd6ba5016f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_18231c64-4bdb-463d-b161-85bd6ba5016f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_000a5a82-8d5f-4292-8a47-ab190d42a67f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_131b3ad8-9168-44a3-9294-f6260b44260c" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_000a5a82-8d5f-4292-8a47-ab190d42a67f" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.adp.com/role/InterimFinancialDatabySegmentFinancialDataByStrategicBusinessUnitSegmentDetails" xlink:type="simple" xlink:href="adp-20230331.xsd#InterimFinancialDatabySegmentFinancialDataByStrategicBusinessUnitSegmentDetails"/>
  <link:definitionLink xlink:role="http://www.adp.com/role/InterimFinancialDatabySegmentFinancialDataByStrategicBusinessUnitSegmentDetails" xlink:type="extended" id="i8cf98c5df7ed4d2982886ca24b872f11_InterimFinancialDatabySegmentFinancialDataByStrategicBusinessUnitSegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_dbfe0acb-7a34-41fc-89ec-3a08c10c4ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d6404c1c-5330-4d07-833b-9fed496a426d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dbfe0acb-7a34-41fc-89ec-3a08c10c4ffe" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d6404c1c-5330-4d07-833b-9fed496a426d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_700bc04c-fde5-40a6-aa9e-54e75be9d99e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dbfe0acb-7a34-41fc-89ec-3a08c10c4ffe" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_700bc04c-fde5-40a6-aa9e-54e75be9d99e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4f228e33-750b-4f1a-91ac-9cf0fff190df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dbfe0acb-7a34-41fc-89ec-3a08c10c4ffe" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4f228e33-750b-4f1a-91ac-9cf0fff190df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_f26af9aa-1441-4fc3-8e8f-5baadefa802a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4f228e33-750b-4f1a-91ac-9cf0fff190df" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_f26af9aa-1441-4fc3-8e8f-5baadefa802a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f26af9aa-1441-4fc3-8e8f-5baadefa802a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_f26af9aa-1441-4fc3-8e8f-5baadefa802a" xlink:to="loc_us-gaap_SegmentDomain_f26af9aa-1441-4fc3-8e8f-5baadefa802a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_355de97e-41d2-434b-895d-033a8fb792eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_f26af9aa-1441-4fc3-8e8f-5baadefa802a" xlink:to="loc_us-gaap_SegmentDomain_355de97e-41d2-434b-895d-033a8fb792eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_EmployerServicesSegmentMember_933f0e2f-f1b6-4b3e-8e08-95042ffbefab" xlink:href="adp-20230331.xsd#adp_EmployerServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_355de97e-41d2-434b-895d-033a8fb792eb" xlink:to="loc_adp_EmployerServicesSegmentMember_933f0e2f-f1b6-4b3e-8e08-95042ffbefab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_adp_ProfessionalEmployeeOrganizationServicesSegmentMember_91658b8d-9719-4287-906c-2f161dd06745" xlink:href="adp-20230331.xsd#adp_ProfessionalEmployeeOrganizationServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_355de97e-41d2-434b-895d-033a8fb792eb" xlink:to="loc_adp_ProfessionalEmployeeOrganizationServicesSegmentMember_91658b8d-9719-4287-906c-2f161dd06745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_ba4a5be2-0e13-4d5e-846c-727791008185" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_355de97e-41d2-434b-895d-033a8fb792eb" xlink:to="loc_us-gaap_AllOtherSegmentsMember_ba4a5be2-0e13-4d5e-846c-727791008185" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.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_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
