<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with WebFilings-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CommitmentsAndContingenciesDetails" xlink:href="efsc-20120930.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedBalanceSheets" xlink:href="efsc-20120930.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:href="efsc-20120930.xsd#CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:href="efsc-20120930.xsd#CondensedConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:href="efsc-20120930.xsd#CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfOperations" xlink:href="efsc-20120930.xsd#CondensedConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" xlink:href="efsc-20120930.xsd#CondensedConsolidatedStatementsOfShareholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:href="efsc-20120930.xsd#CondensedConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/DerivativeFinancialInstrumentsDetails" xlink:href="efsc-20120930.xsd#DerivativeFinancialInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/DocumentAndEntityInformationDocument" xlink:href="efsc-20120930.xsd#DocumentAndEntityInformationDocument" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/EarningsPerShareDetails" xlink:href="efsc-20120930.xsd#EarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/FairValueMeasurementsEstimateOfFairValueOfFinancialInstrumentsNotRecordedAtFairValueOnBalanceSheetDetails" xlink:href="efsc-20120930.xsd#FairValueMeasurementsEstimateOfFairValueOfFinancialInstrumentsNotRecordedAtFairValueOnBalanceSheetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/FairValueMeasurementsFairValueFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:href="efsc-20120930.xsd#FairValueMeasurementsFairValueFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/FairValueMeasurementsFairValueMeasurementsNonrecurringDetails" xlink:href="efsc-20120930.xsd#FairValueMeasurementsFairValueMeasurementsNonrecurringDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:href="efsc-20120930.xsd#FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/FairValueMeasurementsSummaryOfCarryingAmountsAndFairValuesOfCompanysFinancialInstrumentsOnConsolidatedBalanceSheetsDetails" xlink:href="efsc-20120930.xsd#FairValueMeasurementsSummaryOfCarryingAmountsAndFairValuesOfCompanysFinancialInstrumentsOnConsolidatedBalanceSheetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/InvestmentsScheduleOfAvailableForSaleSecuritiesReconciliationDetails" xlink:href="efsc-20120930.xsd#InvestmentsScheduleOfAvailableForSaleSecuritiesReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/InvestmentsScheduleOfUnrealizedLossOnInvestmentsDetails" xlink:href="efsc-20120930.xsd#InvestmentsScheduleOfUnrealizedLossOnInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansAllowanceForCreditLossesOnFinancingReceivablesDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansCoveredByLossShareCoveredLoansAllowanceForCreditLossesOnFinancingReceivablesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfAgingOfRecordedInvestmentInPastDueCoveredLoansByPortfolioClassAndCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfAgingOfRecordedInvestmentInPastDueCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfCoveredLoansByCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfCoveredLoansByCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansTables" xlink:href="efsc-20120930.xsd#PortfolioLoansCoveredByLossShareCoveredLoansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAgingOfRecordedInvestmentInPastDueNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAgingOfRecordedInvestmentInPastDueNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAllowanceForLoanLossesForNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAllowanceForLoanLossesForNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansByCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansByCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansIndividuallyEvaluatedForImpairmentByCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansIndividuallyEvaluatedForImpairmentByCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredAndSubsequentlyDefaultedDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredAndSubsequentlyDefaultedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByRiskCategoryOfNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByRiskCategoryOfNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodDetails" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredTables" xlink:href="efsc-20120930.xsd#PortfolioLoansNotCoveredByLossShareNonCoveredTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.enterprisebank.com/role/SegmentReportingDetails" xlink:href="efsc-20120930.xsd#SegmentReportingDetails" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ScheduleOfCommitmentsLineItems" xlink:label="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ScheduleOfCommitmentsTable" xlink:label="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsAxis" xlink:label="loc_efsc_NatureOfCommitmentsAxis_1D12915CEA9B24A5A17DC1533281FA1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:to="loc_efsc_NatureOfCommitmentsAxis_1D12915CEA9B24A5A17DC1533281FA1C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsDomain" xlink:label="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_NatureOfCommitmentsAxis_1D12915CEA9B24A5A17DC1533281FA1C" xlink:to="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsDomain" xlink:label="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_NatureOfCommitmentsAxis_1D12915CEA9B24A5A17DC1533281FA1C" xlink:to="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_UnadvancedCommitmentOnImpairedLoanMember" xlink:label="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_7099634D462BDB329E1AC1533281072E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A" xlink:to="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_7099634D462BDB329E1AC1533281072E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FixedRateLoanCommitmentMember" xlink:label="loc_efsc_FixedRateLoanCommitmentMember_32F05EFC1A3F6456634DC15332815816" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A" xlink:to="loc_efsc_FixedRateLoanCommitmentMember_32F05EFC1A3F6456634DC15332815816" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CreditLinesWithUsageRestrictionsMember" xlink:label="loc_efsc_CreditLinesWithUsageRestrictionsMember_27EF830A57151BD2AD0DC1533281D118" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_NatureOfCommitmentsDomain_191B52BE79424E155B3EC1533281872A" xlink:to="loc_efsc_CreditLinesWithUsageRestrictionsMember_27EF830A57151BD2AD0DC1533281D118" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_869EC19D0ECC3265F790C1533281476A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:to="loc_us-gaap_FinancialInstrumentAxis_869EC19D0ECC3265F790C1533281476A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_869EC19D0ECC3265F790C1533281476A" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_869EC19D0ECC3265F790C1533281476A" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsToExtendCreditMember" xlink:label="loc_us-gaap_CommitmentsToExtendCreditMember_60625ADC314D25C775F2C153328190DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5" xlink:to="loc_us-gaap_CommitmentsToExtendCreditMember_60625ADC314D25C775F2C153328190DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_AD11790166C93F924752C15332817D5B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_E7E7F6618CDCC078958AC1533281ACD5" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_AD11790166C93F924752C15332817D5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="loc_us-gaap_LitigationCaseAxis_AF3C045A3DE891C7DC7FC15332810C6D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:to="loc_us-gaap_LitigationCaseAxis_AF3C045A3DE891C7DC7FC15332810C6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_913D0A936A677DBDC825C1533281A057_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationCaseAxis_AF3C045A3DE891C7DC7FC15332810C6D" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_913D0A936A677DBDC825C1533281A057_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_913D0A936A677DBDC825C1533281A057" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationCaseAxis_AF3C045A3DE891C7DC7FC15332810C6D" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_913D0A936A677DBDC825C1533281A057" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DistinctiveNotesMember" xlink:label="loc_efsc_DistinctiveNotesMember_ABA362C107BEA5C8917AC1533281414F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_913D0A936A677DBDC825C1533281A057" xlink:to="loc_efsc_DistinctiveNotesMember_ABA362C107BEA5C8917AC1533281414F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_Pendinglitigationcasenumber1Member" xlink:label="loc_efsc_Pendinglitigationcasenumber1Member_35F5CEE3718745A98310C15332817320" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_DistinctiveNotesMember_ABA362C107BEA5C8917AC1533281414F" xlink:to="loc_efsc_Pendinglitigationcasenumber1Member_35F5CEE3718745A98310C15332817320" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_Pendinglitigationcasenumber2Member" xlink:label="loc_efsc_Pendinglitigationcasenumber2Member_73A3E233E2C52E27ADCEC15332907E5F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_DistinctiveNotesMember_ABA362C107BEA5C8917AC1533281414F" xlink:to="loc_efsc_Pendinglitigationcasenumber2Member_73A3E233E2C52E27ADCEC15332907E5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_BC74B7DA62395CF0747EC15332908F43" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_ScheduleOfCommitmentsTable_B60CDD890AE457F0F046C153328115D2" xlink:to="loc_us-gaap_RangeAxis_BC74B7DA62395CF0747EC15332908F43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_BC74B7DA62395CF0747EC15332908F43" xlink:to="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_BC74B7DA62395CF0747EC15332908F43" xlink:to="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B23253DEBC7F2C94CC01C1533290AA77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3" xlink:to="loc_us-gaap_MaximumMember_B23253DEBC7F2C94CC01C1533290AA77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_DB0C27F9E49FD8138B20C1533290A105" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_E0223A726C8B9DC449FFC1533290C8A3" xlink:to="loc_us-gaap_MinimumMember_DB0C27F9E49FD8138B20C1533290A105" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend_0B24FE5EC09093C1AC46C15332908B2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend_0B24FE5EC09093C1AC46C15332908B2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" xlink:label="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_B3B7A07D48CD8436A84BC1533290973F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_B3B7A07D48CD8436A84BC1533290973F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_7CA22ED5B1E63BFE7C09C1533290DFB5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_7CA22ED5B1E63BFE7C09C1533290DFB5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ContractualAmountsOfOffBalanceSheetFinancialInstruments" xlink:label="loc_efsc_ContractualAmountsOfOffBalanceSheetFinancialInstruments_0A3C9F1F0AF389066330C1533290A261" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_ContractualAmountsOfOffBalanceSheetFinancialInstruments_0A3C9F1F0AF389066330C1533290A261" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RemaingTermOfLettersOfCredit" xlink:label="loc_efsc_RemaingTermOfLettersOfCredit_4C9DFA857B3863C374F3C15332900BC2" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_RemaingTermOfLettersOfCredit_4C9DFA857B3863C374F3C15332900BC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_1BC0B5C2BCB6F4562EB7C15332901BAD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_1BC0B5C2BCB6F4562EB7C15332901BAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LossContingencyDamagesSoughtValue" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_0DAB63FD0708237C6F0FC15332903E64" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_0DAB63FD0708237C6F0FC15332903E64" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestRateOnDamagesSought" xlink:label="loc_efsc_InterestRateOnDamagesSought_5C970043F9B41C6D5E51C1533290BA4B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_InterestRateOnDamagesSought_5C970043F9B41C6D5E51C1533290BA4B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NumberOfCountsFoundGuilty" xlink:label="loc_efsc_NumberOfCountsFoundGuilty_45D145501EFE9D2298A4C15332909F8C" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ScheduleOfCommitmentsLineItems_F4DAA35EBC480B2F588CC1533290C3B3" xlink:to="loc_efsc_NumberOfCountsFoundGuilty_45D145501EFE9D2298A4C15332909F8C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_B151D6470BFB596DB6519881BF3CD130" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_3DC4C19F3FBEA984A8359881BF3CFEFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_B151D6470BFB596DB6519881BF3CD130" xlink:to="loc_us-gaap_StatementTable_3DC4C19F3FBEA984A8359881BF3CFEFD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_7E93E0AB28AE249F9B4F9881BF3C3CD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3DC4C19F3FBEA984A8359881BF3CFEFD" xlink:to="loc_us-gaap_StatementScenarioAxis_7E93E0AB28AE249F9B4F9881BF3C3CD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_F539BA11A14D286F4CFE9881BF3C5764_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_7E93E0AB28AE249F9B4F9881BF3C3CD4" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_F539BA11A14D286F4CFE9881BF3C5764_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_F539BA11A14D286F4CFE9881BF3C5764" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_7E93E0AB28AE249F9B4F9881BF3C3CD4" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_F539BA11A14D286F4CFE9881BF3C5764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B151D6470BFB596DB6519881BF3CD130" xlink:to="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndDueFromBanks" xlink:label="loc_us-gaap_CashAndDueFromBanks_4F9615CDBE5D9AAEAD509881BF3CFA1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_CashAndDueFromBanks_4F9615CDBE5D9AAEAD509881BF3CFA1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FederalFundsSold" xlink:label="loc_us-gaap_FederalFundsSold_FF4CB41D883CD22455D79881BF3C0C74" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_FederalFundsSold_FF4CB41D883CD22455D79881BF3C0C74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestBearingDepositsInBanks" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_9616A638347D7B2C58809881BF3C5E51" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_InterestBearingDepositsInBanks_9616A638347D7B2C58809881BF3C5E51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashCashEquivalentsAndFederalFundsSold" xlink:label="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_20C7D544CD47C0DC28DE9881BF3C98EB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_20C7D544CD47C0DC28DE9881BF3C98EB" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestBearingDepositsGreaterThan90Days" xlink:label="loc_efsc_InterestBearingDepositsGreaterThan90Days_396547C1A71CFAF8A15C9881BF3C6ECA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_efsc_InterestBearingDepositsGreaterThan90Days_396547C1A71CFAF8A15C9881BF3C6ECA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_219BD427F1EBDF5B08B49881BF3C6EE0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_219BD427F1EBDF5B08B49881BF3C6EE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansHeldForSaleMortgages" xlink:label="loc_us-gaap_LoansHeldForSaleMortgages_A31A08484196C7359B8B9881BF3CB08B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansHeldForSaleMortgages_A31A08484196C7359B8B9881BF3CB08B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A2D4A77BD5E2133034ED9881BF3C97BC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A2D4A77BD5E2133034ED9881BF3C97BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_F23F0EC00894DEB46C049881BF3CE3D6" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansAndLeasesReceivableAllowance_F23F0EC00894DEB46C049881BF3CE3D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_AE08C6E36B86151A38199881BF3C538C" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_AE08C6E36B86151A38199881BF3C538C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmountCovered" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmountCovered_367410BF17532D7B8FC69881BF3C6F86" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmountCovered_367410BF17532D7B8FC69881BF3C6F86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered_CA6B47C81A1EA92F70019881BF3C8C87" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered_CA6B47C81A1EA92F70019881BF3C8C87" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherRealEstateNotCoveredUnderFdicLossShare" xlink:label="loc_efsc_OtherRealEstateNotCoveredUnderFdicLossShare_EA460DC24DEE93725BDB9881BF3C5923" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_efsc_OtherRealEstateNotCoveredUnderFdicLossShare_EA460DC24DEE93725BDB9881BF3C5923" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherRealEstateCoveredUnderFdicLossShare" xlink:label="loc_efsc_OtherRealEstateCoveredUnderFdicLossShare_788BD5CEF083D32AA2EA9881BF3CAF39" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_efsc_OtherRealEstateCoveredUnderFdicLossShare_788BD5CEF083D32AA2EA9881BF3CAF39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherInvestmentsAndSecuritiesAtCost" xlink:label="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_7A447D0F7AF88503503B9881BF3CE4F2" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_7A447D0F7AF88503503B9881BF3CE4F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_DDC94FD6FB408D0171239881BF3CF88A" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_DDC94FD6FB408D0171239881BF3CF88A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestReceivable" xlink:label="loc_us-gaap_InterestReceivable_D8F951425E09A2D1915A9881BF3CFBCA" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_InterestReceivable_D8F951425E09A2D1915A9881BF3CFBCA" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSale" xlink:label="loc_efsc_StateTaxCreditsHeldForSale_F838F2398CD3414CAA309881BF3C0326" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_efsc_StateTaxCreditsHeldForSale_F838F2398CD3414CAA309881BF3C0326" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FDICIndemnificationAsset" xlink:label="loc_us-gaap_FDICIndemnificationAsset_60A6DBD20815B307A97E9881BF3C254B" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_FDICIndemnificationAsset_60A6DBD20815B307A97E9881BF3C254B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_D1A372447D0292DC535A9881BF3C95E3" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_Goodwill_D1A372447D0292DC535A9881BF3C95E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_D562590CC403D767BDD79881BF3CD7C1" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_D562590CC403D767BDD79881BF3CD7C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_79FD1A319464703F68E59881BF3C615B" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_79FD1A319464703F68E59881BF3C615B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_9779CAB7DF9924AF2CA69881BF3C6F09" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_0AD9A9EC8315D94414C09881BF3C9633" xlink:to="loc_us-gaap_Assets_9779CAB7DF9924AF2CA69881BF3C6F09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B151D6470BFB596DB6519881BF3CD130" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestBearingDomesticDepositDemand" xlink:label="loc_us-gaap_NoninterestBearingDomesticDepositDemand_3EA90277215557DE48A29881BF3C7BAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_NoninterestBearingDomesticDepositDemand_3EA90277215557DE48A29881BF3C7BAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestBearingDomesticDepositChecking" xlink:label="loc_us-gaap_InterestBearingDomesticDepositChecking_5A2F721ACBF4D0EC32549881BF3CA78E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_InterestBearingDomesticDepositChecking_5A2F721ACBF4D0EC32549881BF3CA78E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits_851A324608063C2740979881BF3C79E4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_DepositsMoneyMarketDeposits_851A324608063C2740979881BF3C79E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepositsSavingsDeposits" xlink:label="loc_us-gaap_DepositsSavingsDeposits_58CF7B2EA588A6C0DA149881BF3C263A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_DepositsSavingsDeposits_58CF7B2EA588A6C0DA149881BF3C263A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TimeDepositsAbstract" xlink:label="loc_us-gaap_TimeDepositsAbstract_DDC5C191774FF3E7E03B9881BF3C6A17" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_TimeDepositsAbstract_DDC5C191774FF3E7E03B9881BF3C6A17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TimeDeposits100000OrMore" xlink:label="loc_us-gaap_TimeDeposits100000OrMore_F8A15C24F6CCFB9A0A7D9881BF3C4363" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimeDepositsAbstract_DDC5C191774FF3E7E03B9881BF3C6A17" xlink:to="loc_us-gaap_TimeDeposits100000OrMore_F8A15C24F6CCFB9A0A7D9881BF3C4363" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TimeDepositsLessThan100000" xlink:label="loc_us-gaap_TimeDepositsLessThan100000_6EA4524B0B48597CC72D9881BF3CF356" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimeDepositsAbstract_DDC5C191774FF3E7E03B9881BF3C6A17" xlink:to="loc_us-gaap_TimeDepositsLessThan100000_6EA4524B0B48597CC72D9881BF3CF356" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Deposits" xlink:label="loc_us-gaap_Deposits_07E818D48EB6067C060B9881BF3C00D2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_Deposits_07E818D48EB6067C060B9881BF3C00D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubordinatedDebt" xlink:label="loc_us-gaap_SubordinatedDebt_A510EAB0E66CCA8354FB9881BF3C0A7C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_SubordinatedDebt_A510EAB0E66CCA8354FB9881BF3C0A7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesLongTerm" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_BF8A9B30CBDF042CA5BD9881BF3CE18E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_BF8A9B30CBDF042CA5BD9881BF3CE18E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherBorrowings" xlink:label="loc_us-gaap_OtherBorrowings_8B0A10C84E08E00417F89881BF3C7993" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_OtherBorrowings_8B0A10C84E08E00417F89881BF3C7993" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_C5689605F9D39A3BCC469881BF3C8E0B" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_C5689605F9D39A3BCC469881BF3C8E0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_7CEAA59260E9F50FEEEB9881BF3C9F6B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_OtherLiabilities_7CEAA59260E9F50FEEEB9881BF3C9F6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_8230F5C4598DECDF1DDB9881BF3C1371" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_Liabilities_8230F5C4598DECDF1DDB9881BF3C1371" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_B54C3B528CBAEA9469989881BF3CF585" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_PreferredStockValue_B54C3B528CBAEA9469989881BF3CF585" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_BF3216CDC330AE40BBB79881BF3C315D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_CommonStockValue_BF3216CDC330AE40BBB79881BF3C315D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_765ACDA1ED8694732C2B9881BF3C5F45" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_TreasuryStockValue_765ACDA1ED8694732C2B9881BF3C5F45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_EE85EE77CCD7E076B8719881BF3C321A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_AdditionalPaidInCapital_EE85EE77CCD7E076B8719881BF3C321A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_58860E1708484BC07C5E9881BF3C9B5D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_58860E1708484BC07C5E9881BF3C9B5D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E4A11D71D4CF807B34749881BF3C6274" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E4A11D71D4CF807B34749881BF3C6274" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_346BB407A079C0FBBF0D9881BF3C12B8" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_92A22CF6498BD6FC1CC89881BF3CD9FB" xlink:to="loc_us-gaap_StockholdersEquity_346BB407A079C0FBBF0D9881BF3C12B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_151495117202F23664C49881BF3C3130" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_50134D51A87244E469919881BF3CD6A1" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_151495117202F23664C49881BF3C3130" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_7648A7DB387E64FB843CADDE0A0F675D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:to="loc_us-gaap_StatementTable_7648A7DB387E64FB843CADDE0A0F675D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_DE1569DCB8AF4E365273ADDE0A0F9B8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_7648A7DB387E64FB843CADDE0A0F675D" xlink:to="loc_us-gaap_StatementScenarioAxis_DE1569DCB8AF4E365273ADDE0A0F9B8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_5B520FBC6D448805C9EFADDE0A0F20D5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_DE1569DCB8AF4E365273ADDE0A0F9B8C" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_5B520FBC6D448805C9EFADDE0A0F20D5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_5B520FBC6D448805C9EFADDE0A0F20D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_DE1569DCB8AF4E365273ADDE0A0F9B8C" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_5B520FBC6D448805C9EFADDE0A0F20D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_151ADD69FD697C2D38F9ADDE0A0F33DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:to="loc_us-gaap_AssetsAbstract_151ADD69FD697C2D38F9ADDE0A0F33DC" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CollateralPledged" xlink:label="loc_efsc_CollateralPledged_C473264DB0CA6A07FB0AADDE0A0FB0A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_151ADD69FD697C2D38F9ADDE0A0F33DC" xlink:to="loc_efsc_CollateralPledged_C473264DB0CA6A07FB0AADDE0A0FB0A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowanceCovered" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowanceCovered_55BF7E4A8573015D7352ADDE0A0F3255" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:to="loc_us-gaap_LoansAndLeasesReceivableAllowanceCovered_55BF7E4A8573015D7352ADDE0A0F3255" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSaleFairValueDisclosure" xlink:label="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_7E99A76F6644834DEE1BADDE0A0F48F4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:to="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_7E99A76F6644834DEE1BADDE0A0F48F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_AF39ECA6D59992969D55ADDE0A0F9572" xlink:to="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_E37405D992A92CF8509DADDE0A0F7B0F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_E37405D992A92CF8509DADDE0A0F7B0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_0AFB3340D8902E273848ADDE0A0F8D67" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_0AFB3340D8902E273848ADDE0A0F8D67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_328E90105134AA948188ADDE0A0F3CD4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_PreferredStockSharesIssued_328E90105134AA948188ADDE0A0F3CD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_5AF2DAB3E43A5C663102ADDE0A0F1DEF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_5AF2DAB3E43A5C663102ADDE0A0F1DEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_275DEE06E8A0FCF2237BADDE0A0FAEEC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_275DEE06E8A0FCF2237BADDE0A0FAEEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_D1A4057A6E48B9AEC7D7ADDE0A0FD4FB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_D1A4057A6E48B9AEC7D7ADDE0A0FD4FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_0DE31C13B55FB2B92698ADDE0A0F2EA7" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_CommonStockSharesIssued_0DE31C13B55FB2B92698ADDE0A0F2EA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_70CC880BA718444DD62FADDE0A0F85D2" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_304CDABE19D10D3AE255ADDE0A0F4369" xlink:to="loc_us-gaap_TreasuryStockShares_70CC880BA718444DD62FADDE0A0F85D2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_9D03C55A219A7A5E3E7B989300C336BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_StatementTable_9D03C55A219A7A5E3E7B989300C336BB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_54B98815065BEC56F924989300C3519D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_9D03C55A219A7A5E3E7B989300C336BB" xlink:to="loc_us-gaap_StatementScenarioAxis_54B98815065BEC56F924989300C3519D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_71B95C20E52C6DA76479989300C3FE23_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_54B98815065BEC56F924989300C3519D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_71B95C20E52C6DA76479989300C3FE23_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_71B95C20E52C6DA76479989300C3FE23" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_54B98815065BEC56F924989300C3519D" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_71B95C20E52C6DA76479989300C3FE23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_F34BF7505631CC47B8F0989300C34580" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_F34BF7505631CC47B8F0989300C34580" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_AC78768428088C06ADB7989300C31F1B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_F34BF7505631CC47B8F0989300C34580" xlink:to="loc_us-gaap_NetIncomeLoss_AC78768428088C06ADB7989300C31F1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_F34BF7505631CC47B8F0989300C34580" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationNonproduction" xlink:label="loc_us-gaap_DepreciationNonproduction_330D5354ACDA2598AF7C989300C300B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_DepreciationNonproduction_330D5354ACDA2598AF7C989300C300B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProvisionForLoanAndLeaseLosses" xlink:label="loc_us-gaap_ProvisionForLoanAndLeaseLosses_F98482FA047993061B1D989300C3E1F6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_ProvisionForLoanAndLeaseLosses_F98482FA047993061B1D989300C3E1F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_46B6D1663785538C23FD989300C3A361" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_46B6D1663785538C23FD989300C3A361" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_91F51F4B62FD2A0F588B989300C37A82" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_91F51F4B62FD2A0F588B989300C37A82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_0D5DDDE447C45706185D989300C33857" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_0D5DDDE447C45706185D989300C33857" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnSaleOfDebtInvestments" xlink:label="loc_us-gaap_GainLossOnSaleOfDebtInvestments_7DCDADB8579A145B0AFB989300C30518" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_GainLossOnSaleOfDebtInvestments_7DCDADB8579A145B0AFB989300C30518" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:label="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9ADC1CD387A3D9CA6D6C989300C3A4EA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9ADC1CD387A3D9CA6D6C989300C3A4EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:label="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_CBA5155508155B4D6FB8989300C395EF" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_CBA5155508155B4D6FB8989300C395EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_DF947260DFDEEBE212F9989300C39A5C" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_DF947260DFDEEBE212F9989300C39A5C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_GainOnStateTaxCreditsNet" xlink:label="loc_efsc_GainOnStateTaxCreditsNet_F5962C4300BDC41B7E45989300C3CF26" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_efsc_GainOnStateTaxCreditsNet_F5962C4300BDC41B7E45989300C3CF26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_C0590EC42B4F8DBACEAE989300C3D0B8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_C0590EC42B4F8DBACEAE989300C3D0B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_FBA5651847C20CAADF14989300C34039" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_ShareBasedCompensation_FBA5651847C20CAADF14989300C34039" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairmentOfRealEstate" xlink:label="loc_us-gaap_ImpairmentOfRealEstate_01CCFD5DEAC325D758B9989300C3711E" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_us-gaap_ImpairmentOfRealEstate_01CCFD5DEAC325D758B9989300C3711E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NetAccretionOfLoanDiscountAndIndemnificationAsset" xlink:label="loc_efsc_NetAccretionOfLoanDiscountAndIndemnificationAsset_F444E9C301E08FA53EA2989300C3E932" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_efsc_NetAccretionOfLoanDiscountAndIndemnificationAsset_F444E9C301E08FA53EA2989300C3E932" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ChangesInAbstract" xlink:label="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_C3C2F9610542019FB2B1989300C3E957" xlink:to="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_5E5E7494D5BF70E08DA4989300C3CF92" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_5E5E7494D5BF70E08DA4989300C3CF92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_A4B5614F0D234C835D37989300C3119E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_A4B5614F0D234C835D37989300C3119E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_PrepaidFdicInsurance" xlink:label="loc_efsc_PrepaidFdicInsurance_8DDFE60BA5A4C5134158989300C36D78" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:to="loc_efsc_PrepaidFdicInsurance_8DDFE60BA5A4C5134158989300C36D78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF55D2581E2B07B38B23989300C383A4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF55D2581E2B07B38B23989300C383A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_F1C03F2E870F36D0E8EF989300C33F39" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ChangesInAbstract_64AC75B9C83B51298F9D989300C36A64" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_F1C03F2E870F36D0E8EF989300C33F39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6CDD7A145282E82BB039989300C3EECE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_F34BF7505631CC47B8F0989300C34580" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6CDD7A145282E82BB039989300C3EECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CashReceivedFromAcquisitionOfLegacyBank" xlink:label="loc_efsc_CashReceivedFromAcquisitionOfLegacyBank_C1401C9021039839A0D8989300C3AD73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_efsc_CashReceivedFromAcquisitionOfLegacyBank_C1401C9021039839A0D8989300C3AD73" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CashReceivedFromAcquisitionOfFirstNationalBankOfOlathe" xlink:label="loc_efsc_CashReceivedFromAcquisitionOfFirstNationalBankOfOlathe_8CBB38671E59B191137C989300C352F2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_efsc_CashReceivedFromAcquisitionOfFirstNationalBankOfOlathe_8CBB38671E59B191137C989300C352F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForProceedsFromLoansAndLeases" xlink:label="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_C232C39D23C697A904D8989300C382F5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_C232C39D23C697A904D8989300C382F5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NetCashProceedsReceivedFromFdicLossShareReceivable" xlink:label="loc_efsc_NetCashProceedsReceivedFromFdicLossShareReceivable_203072085FB5B9C3E328989300C3C9DA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_efsc_NetCashProceedsReceivedFromFdicLossShareReceivable_203072085FB5B9C3E328989300C3C9DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_A75A14EAA70EFC511014989300C305D4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_A75A14EAA70EFC511014989300C305D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_53C886AEF80FE73F1942989300C39DDE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_53C886AEF80FE73F1942989300C39DDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments_14465A61ABAE6D22801C989300C36163" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments_14465A61ABAE6D22801C989300C36163" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ProceedsFromSaleOfStateTaxCreditsHeldForSale" xlink:label="loc_efsc_ProceedsFromSaleOfStateTaxCreditsHeldForSale_E352D70805FD2761BDDB989300C3DECD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_efsc_ProceedsFromSaleOfStateTaxCreditsHeldForSale_E352D70805FD2761BDDB989300C3DECD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherRealEstate" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherRealEstate_E0A70F5F36C95E5B9CD6989300C3E869" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherRealEstate_E0A70F5F36C95E5B9CD6989300C3E869" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireInvestmentsAbstract" xlink:label="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_8F9324BF0B59B7E018C7989300C3614A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_8F9324BF0B59B7E018C7989300C3614A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_58B96B1FA69F62326242989300C3E57F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:to="loc_us-gaap_PaymentsToAcquireOtherInvestments_58B96B1FA69F62326242989300C3E57F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_PaymentsToAcquireStateTaxCreditsHeldForSale" xlink:label="loc_efsc_PaymentsToAcquireStateTaxCreditsHeldForSale_4634121D15B30BCC95D4989300C3AF51" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:to="loc_efsc_PaymentsToAcquireStateTaxCreditsHeldForSale_4634121D15B30BCC95D4989300C3AF51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2A178B8FB6266D7D966D989300D39C59" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PaymentsToAcquireInvestmentsAbstract_D228D7DBB04D93FD67B4989300C3E610" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2A178B8FB6266D7D966D989300D39C59" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9A520157573377218560989300D33B0D" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6A49BBA9036B9E6D147C989300C3620B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9A520157573377218560989300D33B0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetChangeNoninterestBearingDepositsDomestic" xlink:label="loc_us-gaap_NetChangeNoninterestBearingDepositsDomestic_F8EFA72C1EBEBCAF640F989300D3780A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_NetChangeNoninterestBearingDepositsDomestic_F8EFA72C1EBEBCAF640F989300D3780A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetChangeInterestBearingDepositsDomestic" xlink:label="loc_us-gaap_NetChangeInterestBearingDepositsDomestic_13085877252E35543E0C989300D34247" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_NetChangeInterestBearingDepositsDomestic_13085877252E35543E0C989300D34247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromFederalHomeLoanBankAdvances" xlink:label="loc_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_5E4674221D0C997650C7989300D33B71" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_5E4674221D0C997650C7989300D33B71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_A7E7A2ABDCE5DAE1E53C989300D33BD7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_A7E7A2ABDCE5DAE1E53C989300D33BD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase_6455AABB389702BAB11B989300D3D1E8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase_6455AABB389702BAB11B989300D3D1E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_27BA63F62908CAAEBB8A989300D3AAA0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_27BA63F62908CAAEBB8A989300D3AAA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_42197BE6FCF1A537A064989300D39862" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_42197BE6FCF1A537A064989300D39862" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_5F4D37B5A58B93231F28989300D39083" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_5F4D37B5A58B93231F28989300D39083" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_EE2212692B257F7874F3989300D3EA96" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_EE2212692B257F7874F3989300D3EA96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_57C4BBDC7854B8C9ABDB989300D3A477" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_57C4BBDC7854B8C9ABDB989300D3A477" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_D03A08E76CEEE7E82251989300D3DDE6" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_19A30BEF66CA5D78D11B989300D3414E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_D03A08E76CEEE7E82251989300D3DDE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_66F50E6A5F9D928D935E989300D30E08" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_66F50E6A5F9D928D935E989300D30E08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_04F3250CBCA1F05EA3B5989300D3CBD4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_04F3250CBCA1F05EA3B5989300D3CBD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_418E8D7E3D042A86F4BD989300D32FFF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_418E8D7E3D042A86F4BD989300D32FFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_96CBE4BF28923B53C725989300D32F14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_418E8D7E3D042A86F4BD989300D32FFF" xlink:to="loc_us-gaap_InterestPaidNet_96CBE4BF28923B53C725989300D32F14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_6B125F28B104D2A29F33989300D39AC9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_418E8D7E3D042A86F4BD989300D32FFF" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_6B125F28B104D2A29F33989300D39AC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_A2A4D75A1C1C3640403E989300D3D16B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_82CAC2F3ECA81492863F989300C3AC2F" xlink:to="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_A2A4D75A1C1C3640403E989300D3D16B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TransferOfOtherRealEstate" xlink:label="loc_us-gaap_TransferOfOtherRealEstate_62A00831ECB4AAAC5182989300D3DC25" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_A2A4D75A1C1C3640403E989300D3D16B" xlink:to="loc_us-gaap_TransferOfOtherRealEstate_62A00831ECB4AAAC5182989300D3DC25" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SalesOfOtherRealEstateFinanced" xlink:label="loc_efsc_SalesOfOtherRealEstateFinanced_763C42AD884879154718989300D3F10B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_A2A4D75A1C1C3640403E989300D3D16B" xlink:to="loc_efsc_SalesOfOtherRealEstateFinanced_763C42AD884879154718989300D3F10B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_3C89ADC10B911EF31A8E988483541930" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:to="loc_us-gaap_StatementTable_3C89ADC10B911EF31A8E988483541930" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_B07A6BE4C1747E71788F9884835415BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3C89ADC10B911EF31A8E988483541930" xlink:to="loc_us-gaap_StatementScenarioAxis_B07A6BE4C1747E71788F9884835415BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_538CE703152B971DA71698848354C2DC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_B07A6BE4C1747E71788F9884835415BC" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_538CE703152B971DA71698848354C2DC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_538CE703152B971DA71698848354C2DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_B07A6BE4C1747E71788F9884835415BC" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_538CE703152B971DA71698848354C2DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_22D1C00707A2FEEBD990988483543533" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:to="loc_us-gaap_NetIncomeLoss_22D1C00707A2FEEBD990988483543533" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_ABB7137E122AB4CFEBDA988483543949" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_ABB7137E122AB4CFEBDA988483543949" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8CBDFB3559DAB5F9688398848354F624" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_ABB7137E122AB4CFEBDA988483543949" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8CBDFB3559DAB5F9688398848354F624" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_C415512AD8F3315201D898848354E3C8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_ABB7137E122AB4CFEBDA988483543949" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_C415512AD8F3315201D898848354E3C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_3BFF22AA6FA2E54F909498848354F65D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_ABB7137E122AB4CFEBDA988483543949" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_3BFF22AA6FA2E54F909498848354F65D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_D9C954094CC9BA3A97ED9884835482E7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_D9C954094CC9BA3A97ED9884835482E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_ADC0E9C2A86DD1E4CB0398848354CA62" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2B21FC0A8286F25F632B988483548CAD" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_ADC0E9C2A86DD1E4CB0398848354CA62" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_0CF9CDD7CEFB95285DCB2B867B6D2991" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_StatementTable_0CF9CDD7CEFB95285DCB2B867B6D2991" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_4B6FAFE7F1A3045C4A252B867B6D2D72" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0CF9CDD7CEFB95285DCB2B867B6D2991" xlink:to="loc_us-gaap_StatementScenarioAxis_4B6FAFE7F1A3045C4A252B867B6D2D72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E838755DA77C55E047442B867B6D893D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_4B6FAFE7F1A3045C4A252B867B6D2D72" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E838755DA77C55E047442B867B6D893D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E838755DA77C55E047442B867B6D893D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_4B6FAFE7F1A3045C4A252B867B6D2D72" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E838755DA77C55E047442B867B6D893D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_4466C4319A6781215B9A2B867B6D7051" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_4466C4319A6781215B9A2B867B6D7051" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract_74289718B66DD793BD042B867B6DDB18" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract_74289718B66DD793BD042B867B6DDB18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeSecuritiesTaxable" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxable_0FB8B18773BC3B02A4802B867B6D02BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract_74289718B66DD793BD042B867B6DDB18" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxable_0FB8B18773BC3B02A4802B867B6D02BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeSecuritiesTaxExempt" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_35695C45EFB1AEC22D9D2B867B6D7A04" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract_74289718B66DD793BD042B867B6DDB18" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_35695C45EFB1AEC22D9D2B867B6D7A04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeFederalFundsSold" xlink:label="loc_us-gaap_InterestIncomeFederalFundsSold_B8EFC9C6D05E78EF9FBE2B867B6DDA81" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_InterestIncomeFederalFundsSold_B8EFC9C6D05E78EF9FBE2B867B6DDA81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeDomesticDeposits" xlink:label="loc_us-gaap_InterestIncomeDomesticDeposits_F86E538C8925401053012B867B6D0E62" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_InterestIncomeDomesticDeposits_F86E538C8925401053012B867B6D0E62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendIncomeOperating" xlink:label="loc_us-gaap_DividendIncomeOperating_8CD63CCD24628368C0042B867B6DA374" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_DividendIncomeOperating_8CD63CCD24628368C0042B867B6DA374" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_234358182C9FA661BDEF2B867B6D13B3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_7AA017290C06E602264D2B867B6D7BCC" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_234358182C9FA661BDEF2B867B6D13B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseAbstract" xlink:label="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseDomesticDepositLiabilitiesChecking" xlink:label="loc_us-gaap_InterestExpenseDomesticDepositLiabilitiesChecking_6E88BB73E73FF6C5C2162B867B6D5BF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseDomesticDepositLiabilitiesChecking_6E88BB73E73FF6C5C2162B867B6D5BF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseMoneyMarketDeposits" xlink:label="loc_us-gaap_InterestExpenseMoneyMarketDeposits_85821356628161B646592B867B6DA233" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseMoneyMarketDeposits_85821356628161B646592B867B6DA233" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseSavingsDeposits" xlink:label="loc_us-gaap_InterestExpenseSavingsDeposits_9088EBE6EB399F92D67F2B867B6D3819" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseSavingsDeposits_9088EBE6EB399F92D67F2B867B6D3819" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseTimeDepositsAbstract" xlink:label="loc_us-gaap_InterestExpenseTimeDepositsAbstract_3CB752414BA625D05C412B867B6DFCCC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseTimeDepositsAbstract_3CB752414BA625D05C412B867B6DFCCC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseTimeDeposits100000OrMore" xlink:label="loc_us-gaap_InterestExpenseTimeDeposits100000OrMore_9248182942ECFEF5F20B2B867B6D6ECE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseTimeDepositsAbstract_3CB752414BA625D05C412B867B6DFCCC" xlink:to="loc_us-gaap_InterestExpenseTimeDeposits100000OrMore_9248182942ECFEF5F20B2B867B6D6ECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseTimeDepositsLessThan100000" xlink:label="loc_us-gaap_InterestExpenseTimeDepositsLessThan100000_A6E9E03B13BD47A341EA2B867B6D1BE2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseTimeDepositsAbstract_3CB752414BA625D05C412B867B6DFCCC" xlink:to="loc_us-gaap_InterestExpenseTimeDepositsLessThan100000_A6E9E03B13BD47A341EA2B867B6D1BE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseSubordinatedNotesAndDebentures" xlink:label="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_3D89A96A767CD7CBCD5D2B867B6D162E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_3D89A96A767CD7CBCD5D2B867B6D162E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm" xlink:label="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_B9CA5CE1D115257353EF2B867B6D8047" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_B9CA5CE1D115257353EF2B867B6D8047" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_7066E8FA5A4E9BF7CE332B867B6D30C1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_7066E8FA5A4E9BF7CE332B867B6D30C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_1361C288CE2DA452A8472B867B6D3952" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_AD1FE422ECFA340F8ACE2B867B6DAA93" xlink:to="loc_us-gaap_InterestExpense_1361C288CE2DA452A8472B867B6D3952" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_CA2E38070DBA3FFFFD9D2B867B6DF41B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_CA2E38070DBA3FFFFD9D2B867B6DF41B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ProvisionForLoanLossesNotCoveredUnderFdicLossShare" xlink:label="loc_efsc_ProvisionForLoanLossesNotCoveredUnderFdicLossShare_C1AA729CE01ECD54DEF92B867B6DE374" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_efsc_ProvisionForLoanLossesNotCoveredUnderFdicLossShare_C1AA729CE01ECD54DEF92B867B6DE374" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ProvisionForLoanLossesCoveredUnderFdicLossShare" xlink:label="loc_efsc_ProvisionForLoanLossesCoveredUnderFdicLossShare_916AD0DB1718F348785E2B867B6DDB66" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_efsc_ProvisionForLoanLossesCoveredUnderFdicLossShare_916AD0DB1718F348785E2B867B6DDB66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_63C3D823FCB859505D0A2B867B6D1A14" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_63C3D823FCB859505D0A2B867B6D1A14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestIncomeAbstract" xlink:label="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FeesAndCommissionsFiduciaryAndTrustActivities" xlink:label="loc_us-gaap_FeesAndCommissionsFiduciaryAndTrustActivities_B1ED2D194A9AFAF4713A2B867B6DFAC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_FeesAndCommissionsFiduciaryAndTrustActivities_B1ED2D194A9AFAF4713A2B867B6DFAC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FeesAndCommissionsDepositorAccounts" xlink:label="loc_us-gaap_FeesAndCommissionsDepositorAccounts_4B1D799D913AFF6073122B867B6DD970" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_FeesAndCommissionsDepositorAccounts_4B1D799D913AFF6073122B867B6DD970" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FeesAndCommissionsOther" xlink:label="loc_us-gaap_FeesAndCommissionsOther_FAC2929455F1D9CD85132B867B6D255F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_FeesAndCommissionsOther_FAC2929455F1D9CD85132B867B6D255F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_F458C822F2D7D00A0D732B867B7D532E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_F458C822F2D7D00A0D732B867B7D532E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_GainOnStateTaxCreditsNet" xlink:label="loc_efsc_GainOnStateTaxCreditsNet_71B35D5C0D8118A300B32B867B7DC156" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_efsc_GainOnStateTaxCreditsNet_71B35D5C0D8118A300B32B867B7DC156" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnSaleOfDebtInvestments" xlink:label="loc_us-gaap_GainLossOnSaleOfDebtInvestments_C348278475F4E27D28C72B867B7D7F7F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_GainLossOnSaleOfDebtInvestments_C348278475F4E27D28C72B867B7D7F7F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ChangeInFdicLossShareReceivable" xlink:label="loc_efsc_ChangeInFdicLossShareReceivable_80F89E99FD00B8F9F6432B867B7D9005" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_efsc_ChangeInFdicLossShareReceivable_80F89E99FD00B8F9F6432B867B7D9005" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome" xlink:label="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_1AFAE6008A41D6DBB8712B867B7DD5A0" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_1AFAE6008A41D6DBB8712B867B7DD5A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_C7DE7EE85D746A3875ED2B867B7DE19E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_DD19FCA96A6BD34CB99B2B867B6D493F" xlink:to="loc_us-gaap_NoninterestIncome_C7DE7EE85D746A3875ED2B867B7DE19E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestExpenseAbstract" xlink:label="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_F9935932DC587C0B5E8A2B867B7D64A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_LaborAndRelatedExpense_F9935932DC587C0B5E8A2B867B7D64A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OccupancyNet" xlink:label="loc_us-gaap_OccupancyNet_D7FB6DE3A678437390A82B867B7DD851" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_OccupancyNet_D7FB6DE3A678437390A82B867B7DD851" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquipmentExpense" xlink:label="loc_us-gaap_EquipmentExpense_9648BD27DAAD083FB09E2B867B7D96D6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_EquipmentExpense_9648BD27DAAD083FB09E2B867B7D96D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InformationTechnologyAndDataProcessing" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_A9D14364CAC8712D8EFB2B867B7DF09B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_A9D14364CAC8712D8EFB2B867B7DF09B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FdicAndOtherInsurance" xlink:label="loc_efsc_FdicAndOtherInsurance_A58EA4F0763FEF6CCCAC2B867B7DC8F3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_efsc_FdicAndOtherInsurance_A58EA4F0763FEF6CCCAC2B867B7DC8F3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoanLegalAndOtherRealEstateExpense" xlink:label="loc_efsc_LoanLegalAndOtherRealEstateExpense_B3044C8635E0CAD8CF322B867B7D4D3B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_efsc_LoanLegalAndOtherRealEstateExpense_B3044C8635E0CAD8CF322B867B7D4D3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoninterestExpense" xlink:label="loc_us-gaap_OtherNoninterestExpense_3FC91CBB5F3091C0B75B2B867B7D3DA1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_OtherNoninterestExpense_3FC91CBB5F3091C0B75B2B867B7D3DA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_9A7CFF35CDB4D8AF641B2B867B7DE8D0" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_67D4356E25E7CF32F5B02B867B7D5403" xlink:to="loc_us-gaap_NoninterestExpense_9A7CFF35CDB4D8AF641B2B867B7DE8D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_8A7BF031FA72ACBD92742B867B7DDDC2" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_8A7BF031FA72ACBD92742B867B7DDDC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_4D50C1830086D60F72B52B867B7DD5C4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_4D50C1830086D60F72B52B867B7DD5C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_41D31D696E8C194ADAE52B867B7D0345" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_NetIncomeLoss_41D31D696E8C194ADAE52B867B7D0345" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_DC23F0669D94EA3D638A2B867B7D59DA" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_DC23F0669D94EA3D638A2B867B7D59DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_68E712A0F403B7B24EC62B867B7DF198" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_387F1D946BB9681EE2F92B867B6D6441" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_68E712A0F403B7B24EC62B867B7DF198" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_32AA7DF282BA2561829E2B867B7D7D02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_68E712A0F403B7B24EC62B867B7DF198" xlink:to="loc_us-gaap_EarningsPerShareBasic_32AA7DF282BA2561829E2B867B7D7D02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_4F761932022F6481E3C72B867B7DAA05" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_68E712A0F403B7B24EC62B867B7DF198" xlink:to="loc_us-gaap_EarningsPerShareDiluted_4F761932022F6481E3C72B867B7DAA05" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_D83FF822A374C5D143E69886D9601F2F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_ED8FC139D88CADEF7B089886D96031B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_D83FF822A374C5D143E69886D9601F2F" xlink:to="loc_us-gaap_StatementTable_ED8FC139D88CADEF7B089886D96031B8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_916CF58B5AB9FA4507829886D960C7EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ED8FC139D88CADEF7B089886D96031B8" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_916CF58B5AB9FA4507829886D960C7EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_4FA6DF5F419102688C859886D9609ADA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_916CF58B5AB9FA4507829886D960C7EF" xlink:to="loc_us-gaap_EquityComponentDomain_4FA6DF5F419102688C859886D9609ADA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_4FA6DF5F419102688C859886D9609ADA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_916CF58B5AB9FA4507829886D960C7EF" xlink:to="loc_us-gaap_EquityComponentDomain_4FA6DF5F419102688C859886D9609ADA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4FA6DF5F419102688C859886D9609ADA" xlink:to="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_E3168AC44441C40D89459886D960ABE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_PreferredStockMember_E3168AC44441C40D89459886D960ABE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_774126DB82DF3C1683E49886D9609379" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_CommonStockMember_774126DB82DF3C1683E49886D9609379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_B6FC75D064AA4384D9A59886D960A0B5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_TreasuryStockMember_B6FC75D064AA4384D9A59886D960A0B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_44179CE79EC3BD11554C9886D960EE09" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_44179CE79EC3BD11554C9886D960EE09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_E942DBA89FE3C673430C9886D9606565" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_RetainedEarningsMember_E942DBA89FE3C673430C9886D9606565" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_80D1810A5956107DC0149886D9608EC5" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_D5562418B2CFB7FF32739886D960AE85" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_80D1810A5956107DC0149886D9608EC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D83FF822A374C5D143E69886D9601F2F" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_9084D1E61F66DE6F67E89886D96014E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_StockholdersEquity_9084D1E61F66DE6F67E89886D96014E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A272DA512D833DC95C209886D960BE73" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_NetIncomeLoss_A272DA512D833DC95C209886D960BE73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_916CD66C0FE27B6ACB5F9886D960F5E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_916CD66C0FE27B6ACB5F9886D960F5E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_C06DAA0996ED95352EF59886D960C1C8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_C06DAA0996ED95352EF59886D960C1C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_FA163DEF6B8B1454FBB09886D9603FF3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_FA163DEF6B8B1454FBB09886D9603FF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_8EE330A4CBC74F0D61669886D9608EFE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_8EE330A4CBC74F0D61669886D9608EFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_58D9A661D8FA2C1E67329886D960D68B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_DividendsCommonStockCash_58D9A661D8FA2C1E67329886D960D68B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="loc_us-gaap_DividendsPreferredStockCash_564E390A7AA96D28424A9886D9604F90" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_DividendsPreferredStockCash_564E390A7AA96D28424A9886D9604F90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockAccretionOfRedemptionDiscount" xlink:label="loc_us-gaap_PreferredStockAccretionOfRedemptionDiscount_77914AA338BBCF2F71379886D9607B62" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_PreferredStockAccretionOfRedemptionDiscount_77914AA338BBCF2F71379886D9607B62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_5DE3E3A2EE146C3C17269886D960F74B" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_5DE3E3A2EE146C3C17269886D960F74B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_1E6D7AA48CD5C4954A679886D9605DBB" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_1E6D7AA48CD5C4954A679886D9605DBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationNonvestedSharesRequisiteServicePeriodRecognition" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationNonvestedSharesRequisiteServicePeriodRecognition_578B3C5AF040BC6C6A159886D970C445" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationNonvestedSharesRequisiteServicePeriodRecognition_578B3C5AF040BC6C6A159886D970C445" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:label="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_0E53EB4E28EBAA11B2569886D9707B01" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D58D53FB03DD7A0249E29886D960067B" xlink:to="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_0E53EB4E28EBAA11B2569886D9707B01" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/CondensedConsolidatedStatementsOfShareholdersEquityParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_51947C269B4AFEB5023A2B867B4E00EB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_445ADE485FDC7E9760FB2B867B4E9A3B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_51947C269B4AFEB5023A2B867B4E00EB" xlink:to="loc_us-gaap_StatementTable_445ADE485FDC7E9760FB2B867B4E9A3B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_D87A81A7C4DB73661B062B867B4E0E51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_445ADE485FDC7E9760FB2B867B4E9A3B" xlink:to="loc_us-gaap_StatementScenarioAxis_D87A81A7C4DB73661B062B867B4E0E51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_6F8EE013C13455F77D052B867B4EAC7E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_D87A81A7C4DB73661B062B867B4E0E51" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_6F8EE013C13455F77D052B867B4EAC7E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_6F8EE013C13455F77D052B867B4EAC7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_D87A81A7C4DB73661B062B867B4E0E51" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_6F8EE013C13455F77D052B867B4EAC7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_C0F89B8FF942142C50862B867B4EBFB2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_51947C269B4AFEB5023A2B867B4E00EB" xlink:to="loc_us-gaap_CommonStockDividendsPerShareCashPaid_C0F89B8FF942142C50862B867B4EBFB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_20A76AC92FB23C7E17872B867B4EF2BE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_51947C269B4AFEB5023A2B867B4E00EB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_20A76AC92FB23C7E17872B867B4EF2BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_60392DC90A1B6ECFCA332B867B4E64DC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_51947C269B4AFEB5023A2B867B4E00EB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_60392DC90A1B6ECFCA332B867B4E64DC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/DerivativeFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_74BB5A7FC239E9EAC7192B867AA2571D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:to="loc_us-gaap_HedgingDesignationAxis_74BB5A7FC239E9EAC7192B867AA2571D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_0AA452298AA3005F1BB92B867AA25734_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_74BB5A7FC239E9EAC7192B867AA2571D" xlink:to="loc_us-gaap_HedgingDesignationDomain_0AA452298AA3005F1BB92B867AA25734_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_0AA452298AA3005F1BB92B867AA25734" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_74BB5A7FC239E9EAC7192B867AA2571D" xlink:to="loc_us-gaap_HedgingDesignationDomain_0AA452298AA3005F1BB92B867AA25734" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_20468264330E1CF9CA292B867AA22415" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_0AA452298AA3005F1BB92B867AA25734" xlink:to="loc_us-gaap_NondesignatedMember_20468264330E1CF9CA292B867AA22415" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DerivativeInstrumentPurposeAxis" xlink:label="loc_efsc_DerivativeInstrumentPurposeAxis_C93A0FC6AAE0A7B8D55A2B867AA23F1F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:to="loc_efsc_DerivativeInstrumentPurposeAxis_C93A0FC6AAE0A7B8D55A2B867AA23F1F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DerivativeInstrumentPurposeDomain" xlink:label="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_DerivativeInstrumentPurposeAxis_C93A0FC6AAE0A7B8D55A2B867AA23F1F" xlink:to="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DerivativeInstrumentPurposeDomain" xlink:label="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_DerivativeInstrumentPurposeAxis_C93A0FC6AAE0A7B8D55A2B867AA23F1F" xlink:to="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RiskManagementMember" xlink:label="loc_efsc_RiskManagementMember_6E5AB6B0A8753FC6ABEC2B867AA20FFA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2" xlink:to="loc_efsc_RiskManagementMember_6E5AB6B0A8753FC6ABEC2B867AA20FFA" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ClientRelatedMember" xlink:label="loc_efsc_ClientRelatedMember_CB271DC418DDF8B8CFD42B867AA29556" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_DerivativeInstrumentPurposeDomain_BD111762442DBF269EE52B867AA297F2" xlink:to="loc_efsc_ClientRelatedMember_CB271DC418DDF8B8CFD42B867AA29556" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_B9A9EB5B98A0D779A8672B867AA23C18" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_B9A9EB5B98A0D779A8672B867AA23C18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_B9A9EB5B98A0D779A8672B867AA23C18" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_B9A9EB5B98A0D779A8672B867AA23C18" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsMember" xlink:label="loc_us-gaap_OtherAssetsMember_9C3DC962D4D147BF682A2B867AA2A03D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219" xlink:to="loc_us-gaap_OtherAssetsMember_9C3DC962D4D147BF682A2B867AA2A03D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesMember" xlink:label="loc_us-gaap_OtherLiabilitiesMember_659BC2B7912BC80F073E2B867AA2BC27" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2BEE9CB2642E279EFBB22B867AA25219" xlink:to="loc_us-gaap_OtherLiabilitiesMember_659BC2B7912BC80F073E2B867AA2BC27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_92E8A5DE2074506E98FF2B867AA2F221" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_92E8A5DE2074506E98FF2B867AA2F221" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_92E8A5DE2074506E98FF2B867AA2F221" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_92E8A5DE2074506E98FF2B867AA2F221" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_GainOnStateTaxCreditsNetMember" xlink:label="loc_efsc_GainOnStateTaxCreditsNetMember_68D7816ACFB5311439062B867AA22F2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B" xlink:to="loc_efsc_GainOnStateTaxCreditsNetMember_68D7816ACFB5311439062B867AA22F2D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_MiscellaneousIncomeMember" xlink:label="loc_efsc_MiscellaneousIncomeMember_9531DB887AB07DECAA6E2B867AA2EEDE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B" xlink:to="loc_efsc_MiscellaneousIncomeMember_9531DB887AB07DECAA6E2B867AA2EEDE" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestAndFeesOnLoansMember" xlink:label="loc_efsc_InterestAndFeesOnLoansMember_C290F0045A9C84C96A0A2B867AA20095" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_FBA2BCE24403105DB6102B867AA2B79B" xlink:to="loc_efsc_InterestAndFeesOnLoansMember_C290F0045A9C84C96A0A2B867AA20095" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_8B4F80381B5985A2D70A2B867AA223B4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8CF27450134D7605EF852B867AA2A225" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_8B4F80381B5985A2D70A2B867AA223B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8B4F80381B5985A2D70A2B867AA223B4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8B4F80381B5985A2D70A2B867AA223B4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestRateCapMember" xlink:label="loc_us-gaap_InterestRateCapMember_BC472FED0C787264F8792B867AA2058C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC" xlink:to="loc_us-gaap_InterestRateCapMember_BC472FED0C787264F8792B867AA2058C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_93A3E2E2A7F41D737FFD2B867AA21FF1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC" xlink:to="loc_us-gaap_InterestRateSwapMember_93A3E2E2A7F41D737FFD2B867AA21FF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_7B822AB879811A8253C12B867AA2FE5D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_7C4414821085F4677DD82B867AA291EC" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_7B822AB879811A8253C12B867AA2FE5D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_UnrealizedGainDerivativeInstruments" xlink:label="loc_efsc_UnrealizedGainDerivativeInstruments_60BCC18C3602BFB1F8762B867AA2DFD1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_efsc_UnrealizedGainDerivativeInstruments_60BCC18C3602BFB1F8762B867AA2DFD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimCash_DBAE09A6E93274C08B272B867AA2A3D0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_us-gaap_DerivativeCollateralRightToReclaimCash_DBAE09A6E93274C08B272B867AA2A3D0" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_AmountPaidToEnterIntoSeriesOfInterestRateCaps" xlink:label="loc_efsc_AmountPaidToEnterIntoSeriesOfInterestRateCaps_0804BEF6BAA95E5AE7A62B867AA2AC58" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_efsc_AmountPaidToEnterIntoSeriesOfInterestRateCaps_0804BEF6BAA95E5AE7A62B867AA2AC58" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NumberOfInterestRateSwapsPreviouslyHeldButNowTerminated" xlink:label="loc_efsc_NumberOfInterestRateSwapsPreviouslyHeldButNowTerminated_6E7C79B476E6D515D0FF2B867AA2CDC3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_efsc_NumberOfInterestRateSwapsPreviouslyHeldButNowTerminated_6E7C79B476E6D515D0FF2B867AA2CDC3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DedesignatedDerivativeInstrumentsGainRecognizedInIncome" xlink:label="loc_efsc_DedesignatedDerivativeInstrumentsGainRecognizedInIncome_AF79262D18DC4943DEBD2B867AA219C9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_efsc_DedesignatedDerivativeInstrumentsGainRecognizedInIncome_AF79262D18DC4943DEBD2B867AA219C9" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_AccumulatedOtherComprehensiveIncomeLossDedesignatedDerivativeAmount" xlink:label="loc_efsc_AccumulatedOtherComprehensiveIncomeLossDedesignatedDerivativeAmount_0DA5173FE3075FFE770C2B867AA2A6E6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_efsc_AccumulatedOtherComprehensiveIncomeLossDedesignatedDerivativeAmount_0DA5173FE3075FFE770C2B867AA2A6E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SummaryOfDerivativeInstrumentsAbstract" xlink:label="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8B293A46F490A077EDBA2B867AA2B97D" xlink:to="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_C7D452F8E4D988F030292B867AA2EA0D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:to="loc_invest_DerivativeNotionalAmount_C7D452F8E4D988F030292B867AA2EA0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_F86EBB98BBD4992B810D2B867AA20D86" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_F86EBB98BBD4992B810D2B867AA20D86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_39F4F767C3686BB9EEF82B867AA267EB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_39F4F767C3686BB9EEF82B867AA267EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNet_4F38F0033F51B0E14DB92B867AA24FB4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_778026200279D912DD812B867AA2B648" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNet_4F38F0033F51B0E14DB92B867AA24FB4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/DocumentAndEntityInformationDocument" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityInformationLineItems" xlink:label="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_372F794CCEDF4DF9DD4F2B867C391EEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_EntitiesTable_372F794CCEDF4DF9DD4F2B867C391EEF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_E6E79935E8DCBA3D17542B867C3978B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_372F794CCEDF4DF9DD4F2B867C391EEF" xlink:to="loc_dei_LegalEntityAxis_E6E79935E8DCBA3D17542B867C3978B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EA5EA93F826FD40302082B867C395152_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_E6E79935E8DCBA3D17542B867C3978B2" xlink:to="loc_dei_EntityDomain_EA5EA93F826FD40302082B867C395152_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EA5EA93F826FD40302082B867C395152" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_E6E79935E8DCBA3D17542B867C3978B2" xlink:to="loc_dei_EntityDomain_EA5EA93F826FD40302082B867C395152" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_2165ABC3D4A623734A282B867C39186D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_EntityRegistrantName_2165ABC3D4A623734A282B867C39186D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_59F6D5AF3052B86C1B162B867C39FC1D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_EntityCentralIndexKey_59F6D5AF3052B86C1B162B867C39FC1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_C9D7DCC1228B570CFE812B867C39776B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_CurrentFiscalYearEndDate_C9D7DCC1228B570CFE812B867C39776B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_3F73A53B686AD45B9B422B867C395B93" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_EntityFilerCategory_3F73A53B686AD45B9B422B867C395B93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_7042D69739E53969111F2B867C39A462" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_DocumentType_7042D69739E53969111F2B867C39A462" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_0246A9205518E72FE5C52B867C3941B2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_DocumentPeriodEndDate_0246A9205518E72FE5C52B867C3941B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_80EE2C688767FE7A201F2B867C39ECE0" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_DocumentFiscalYearFocus_80EE2C688767FE7A201F2B867C39ECE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_8C36992DEABFB573A6972B867C391A71" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_DocumentFiscalPeriodFocus_8C36992DEABFB573A6972B867C391A71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_1BECE07BE7DA2BC3C46E2B867C39DF45" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_AmendmentFlag_1BECE07BE7DA2BC3C46E2B867C39DF45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_6B5053181557E356AC3E2B867C39C2C4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_89C2A486BBCFA6BD50C22B867C39D531" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_6B5053181557E356AC3E2B867C39C2C4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_1D4B0577323C5B15434CAE6D807A3C82" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_99A15C18EE1E865B9B06AE6D807A3718" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_1D4B0577323C5B15434CAE6D807A3C82" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_99A15C18EE1E865B9B06AE6D807A3718" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_F64FC49F8FEE11DA8D9EAE6D807AE4DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_99A15C18EE1E865B9B06AE6D807A3718" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_F64FC49F8FEE11DA8D9EAE6D807AE4DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1B48DDF265A66B48BEE2AE6D807A3F65_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_F64FC49F8FEE11DA8D9EAE6D807AE4DB" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1B48DDF265A66B48BEE2AE6D807A3F65_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1B48DDF265A66B48BEE2AE6D807A3F65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_F64FC49F8FEE11DA8D9EAE6D807AE4DB" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1B48DDF265A66B48BEE2AE6D807A3F65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConvertibleDebtSecuritiesMember" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_FEFA34F0534B77A51018AE6D807A3E6D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1B48DDF265A66B48BEE2AE6D807A3F65" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_FEFA34F0534B77A51018AE6D807A3E6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_47F5AF5389F0D6A5494FAE6D807A17EF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_99A15C18EE1E865B9B06AE6D807A3718" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_47F5AF5389F0D6A5494FAE6D807A17EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_75256773D59B07E1BE1DAE6D807AA046_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_47F5AF5389F0D6A5494FAE6D807A17EF" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_75256773D59B07E1BE1DAE6D807AA046_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_75256773D59B07E1BE1DAE6D807AA046" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_47F5AF5389F0D6A5494FAE6D807A17EF" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_75256773D59B07E1BE1DAE6D807AA046" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WarrantMember" xlink:label="loc_us-gaap_WarrantMember_55FDB71B0D9DAAA44823AE6D807ABF3E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_75256773D59B07E1BE1DAE6D807AA046" xlink:to="loc_us-gaap_WarrantMember_55FDB71B0D9DAAA44823AE6D807ABF3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_9ABE930539482E1BEB5BAE6D807AAADB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_1D4B0577323C5B15434CAE6D807A3C82" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_9ABE930539482E1BEB5BAE6D807AAADB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract_290FDB3EF1053FFD4A71AE6D807A26DA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_1D4B0577323C5B15434CAE6D807A3C82" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract_290FDB3EF1053FFD4A71AE6D807A26DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0A8DA636827954945706AE6D807A9806" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract_290FDB3EF1053FFD4A71AE6D807A26DA" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0A8DA636827954945706AE6D807A9806" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/FairValueMeasurementsEstimateOfFairValueOfFinancialInstrumentsNotRecordedAtFairValueOnBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DDBEEEABD6DA67305907AE57659FB607" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FairValueFinancialInstrumentsNotOnBalanceSheetTable" xlink:label="loc_efsc_FairValueFinancialInstrumentsNotOnBalanceSheetTable_3929BC42DD9ECE85F68CAE57659F7E17" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DDBEEEABD6DA67305907AE57659FB607" xlink:to="loc_efsc_FairValueFinancialInstrumentsNotOnBalanceSheetTable_3929BC42DD9ECE85F68CAE57659F7E17" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C0F1783AF264A841DF3AAE57659F1EB2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_FairValueFinancialInstrumentsNotOnBalanceSheetTable_3929BC42DD9ECE85F68CAE57659F7E17" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C0F1783AF264A841DF3AAE57659F1EB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C0F1783AF264A841DF3AAE57659F1EB2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_C0F1783AF264A841DF3AAE57659F1EB2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_4B9394CD6658D122A407AE57659F3CA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_4B9394CD6658D122A407AE57659F3CA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_1769F5EDEE6CA644C29FAE57659FC564" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_1769F5EDEE6CA644C29FAE57659FC564" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_9F0E1DDC69695D33F372AE57659FD069" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_9F0E1DDC69695D33F372AE57659FD069" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C4413A833487AA5EC1D4AE57659F380A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F2476AC8D3CD381984A5AE57659F702F" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C4413A833487AA5EC1D4AE57659F380A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_0758F4F6DC7354ABFB4EAE57659FDEA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DDBEEEABD6DA67305907AE57659FB607" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_0758F4F6DC7354ABFB4EAE57659FDEA2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure" xlink:label="loc_efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure_D27E2356A6814D09E252AE57659F0DA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0758F4F6DC7354ABFB4EAE57659FDEA2" xlink:to="loc_efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure_D27E2356A6814D09E252AE57659F0DA0" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSaleFairValueDisclosure" xlink:label="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_12F69DF1645DE2B58B25AE57659FF08F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0758F4F6DC7354ABFB4EAE57659FDEA2" xlink:to="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_12F69DF1645DE2B58B25AE57659FF08F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_DDBEEEABD6DA67305907AE57659FB607" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:label="loc_us-gaap_DepositsFairValueDisclosure_35D984027B6AAF1B4E66AE57659F966A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:to="loc_us-gaap_DepositsFairValueDisclosure_35D984027B6AAF1B4E66AE57659F966A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_C0617B21E14AB89E3186AE57659FCA7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_C0617B21E14AB89E3186AE57659FCA7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure" xlink:label="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_637A4C76A1FCDAC9F1C3AE57659F582F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:to="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_637A4C76A1FCDAC9F1C3AE57659F582F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherBorrowingsFairValueDisclosure" xlink:label="loc_efsc_OtherBorrowingsFairValueDisclosure_CEFE2F4BDF6DB6BD2DA0AE57659F40A8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_18CD29010C249DFA57E8AE57659F4E02" xlink:to="loc_efsc_OtherBorrowingsFairValueDisclosure_CEFE2F4BDF6DB6BD2DA0AE57659F40A8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/FairValueMeasurementsFairValueFinancialInstrumentsUnobservableInputReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_385D40841DE843EC69342B867C58746F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_22F5E1C805DD3DF014A82B867C58D5C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_385D40841DE843EC69342B867C58746F" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_22F5E1C805DD3DF014A82B867C58D5C8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_DDC31ED71DD8BDDB0C702B867C5800CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_22F5E1C805DD3DF014A82B867C58D5C8" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_DDC31ED71DD8BDDB0C702B867C5800CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_DDC31ED71DD8BDDB0C702B867C5800CC" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_DDC31ED71DD8BDDB0C702B867C5800CC" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesMember" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_FAFEC1BE382B0034F7382B867C583718" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesMember_FAFEC1BE382B0034F7382B867C583718" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSaleMember" xlink:label="loc_efsc_StateTaxCreditsHeldForSaleMember_AE9604846E4ACBBA68232B867C585C74" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_9D6C982CED92521C7DA22B867C58A207" xlink:to="loc_efsc_StateTaxCreditsHeldForSaleMember_AE9604846E4ACBBA68232B867C585C74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_C5BBFA96D018A2A6F4442B867C58EBD7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_22F5E1C805DD3DF014A82B867C58D5C8" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_C5BBFA96D018A2A6F4442B867C58EBD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F7F94B62942CF3EB40E2B867C580EDC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_C5BBFA96D018A2A6F4442B867C58EBD7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F7F94B62942CF3EB40E2B867C580EDC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F7F94B62942CF3EB40E2B867C580EDC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_C5BBFA96D018A2A6F4442B867C58EBD7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F7F94B62942CF3EB40E2B867C580EDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_0DC905B340702D2AE0CC2B867C583ADF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F7F94B62942CF3EB40E2B867C580EDC" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_0DC905B340702D2AE0CC2B867C583ADF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_385D40841DE843EC69342B867C58746F" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_D15625820C002F723FE62B867C58CE28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_D15625820C002F723FE62B867C58CE28" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_TotalGainsLossesAbstract" xlink:label="loc_efsc_TotalGainsLossesAbstract_625A9E5470AFABC7EEF82B867C589D1F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:to="loc_efsc_TotalGainsLossesAbstract_625A9E5470AFABC7EEF82B867C589D1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_732E3251DC9A3B6C35202B867C589E8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_TotalGainsLossesAbstract_625A9E5470AFABC7EEF82B867C589D1F" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_732E3251DC9A3B6C35202B867C589E8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_48D5B7D0FD542089D7A52B867C58920F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_TotalGainsLossesAbstract_625A9E5470AFABC7EEF82B867C589D1F" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_48D5B7D0FD542089D7A52B867C58920F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_8632B4EA7E91CA0794392B867C580F4C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_8632B4EA7E91CA0794392B867C580F4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_75156C8D511E89B2A3202B867C581973" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_8632B4EA7E91CA0794392B867C580F4C" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_75156C8D511E89B2A3202B867C581973" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_638294FB36D6AAA32C782B867C5817B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_8632B4EA7E91CA0794392B867C580F4C" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_638294FB36D6AAA32C782B867C5817B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_DBE5B6F938492A96ECAB2B867C58BE77" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_DBE5B6F938492A96ECAB2B867C58BE77" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangeInUnrealizedRelatingToAssetsStillHeldAtReportingDate" xlink:label="loc_efsc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangeInUnrealizedRelatingToAssetsStillHeldAtReportingDate_BDB2BB22F9F2147096C82B867C58DC10" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_33508949A3F079ACE9F32B867C58DF3B" xlink:to="loc_efsc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangeInUnrealizedRelatingToAssetsStillHeldAtReportingDate_BDB2BB22F9F2147096C82B867C58DC10" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/FairValueMeasurementsFairValueMeasurementsNonrecurringDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F56806BBE037B59FCDC62B867BEB07D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F56806BBE037B59FCDC62B867BEB07D2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9911DA00066321F2B4722B867BEB31A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F56806BBE037B59FCDC62B867BEB07D2" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9911DA00066321F2B4722B867BEB31A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CC70CE1F3A38B96D48852B867BEBBF65_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9911DA00066321F2B4722B867BEB31A7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CC70CE1F3A38B96D48852B867BEBBF65_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CC70CE1F3A38B96D48852B867BEBBF65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9911DA00066321F2B4722B867BEB31A7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CC70CE1F3A38B96D48852B867BEBBF65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_24DAC05B6BB42D9730682B867BEB4923" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_CC70CE1F3A38B96D48852B867BEBBF65" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_24DAC05B6BB42D9730682B867BEB4923" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15AD9D5EE160D0A9BE312B867BEBA845" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F56806BBE037B59FCDC62B867BEB07D2" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15AD9D5EE160D0A9BE312B867BEBA845" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15AD9D5EE160D0A9BE312B867BEBA845" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15AD9D5EE160D0A9BE312B867BEBA845" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_F7A3B1216FCD032016BF2B867BEB986B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_F7A3B1216FCD032016BF2B867BEB986B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_020A0602EFD125D812602B867BEB3AD9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_020A0602EFD125D812602B867BEB3AD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_838F83BB276F35D7C0E02B867BEBD469" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_838F83BB276F35D7C0E02B867BEBD469" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_93E3ADA01056EA6928CE2B867BEB4E1A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_EC77709D5CB7D6A19BCD2B867BEB7371" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_93E3ADA01056EA6928CE2B867BEB4E1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_CEC7EA8FA00E56216BB82B867BEB16AC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F56806BBE037B59FCDC62B867BEB07D2" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_CEC7EA8FA00E56216BB82B867BEB16AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_CEC7EA8FA00E56216BB82B867BEB16AC" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_CEC7EA8FA00E56216BB82B867BEB16AC" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ImpairedLoansMember" xlink:label="loc_efsc_ImpairedLoansMember_D9E7211A5A059CEA9D0F2B867BEB3EFA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76" xlink:to="loc_efsc_ImpairedLoansMember_D9E7211A5A059CEA9D0F2B867BEB3EFA" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherRealEstateMember" xlink:label="loc_efsc_OtherRealEstateMember_AA3B43412D3CB3B30F822B867BEB4301" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D6ABC3989B22968CF3942B867BEBDC76" xlink:to="loc_efsc_OtherRealEstateMember_AA3B43412D3CB3B30F822B867BEB4301" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_64118D15C754928B1B272B867BEBC7A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:to="loc_us-gaap_LoansReceivableFairValueDisclosure_64118D15C754928B1B272B867BEBC7A5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_AssetsFairValueDisclosureChangeInFairValueGainsLossesInPeriod" xlink:label="loc_efsc_AssetsFairValueDisclosureChangeInFairValueGainsLossesInPeriod_977D96157BA29996956B2B867BEB7028" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:to="loc_efsc_AssetsFairValueDisclosureChangeInFairValueGainsLossesInPeriod_977D96157BA29996956B2B867BEB7028" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherRealEstateFairValueDisclosure" xlink:label="loc_efsc_OtherRealEstateFairValueDisclosure_42FB8F2C18A7F0771D3C2B867BEBCB25" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:to="loc_efsc_OtherRealEstateFairValueDisclosure_42FB8F2C18A7F0771D3C2B867BEBCB25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_79B7370758DC6F9779192B867BEBFD51" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7C625B8AD2FC4A33BE912B867BEB47CA" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_79B7370758DC6F9779192B867BEBFD51" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/FairValueMeasurementsFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ReferenceRateAxis" xlink:label="loc_efsc_ReferenceRateAxis_DCAA87A7CC832D6EFF49AE566590E787" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:to="loc_efsc_ReferenceRateAxis_DCAA87A7CC832D6EFF49AE566590E787" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ReferenceRateDomain" xlink:label="loc_efsc_ReferenceRateDomain_30B37B88588199FB2A18AE56659066EF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_ReferenceRateAxis_DCAA87A7CC832D6EFF49AE566590E787" xlink:to="loc_efsc_ReferenceRateDomain_30B37B88588199FB2A18AE56659066EF_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ReferenceRateDomain" xlink:label="loc_efsc_ReferenceRateDomain_30B37B88588199FB2A18AE56659066EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_ReferenceRateAxis_DCAA87A7CC832D6EFF49AE566590E787" xlink:to="loc_efsc_ReferenceRateDomain_30B37B88588199FB2A18AE56659066EF" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LiborSwapCurveMember" xlink:label="loc_efsc_LiborSwapCurveMember_CEA3E2FC879A2EA3C677AE5665909C60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_ReferenceRateDomain_30B37B88588199FB2A18AE56659066EF" xlink:to="loc_efsc_LiborSwapCurveMember_CEA3E2FC879A2EA3C677AE5665909C60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_ED5599A3D78D00809C14AE5665906645" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_ED5599A3D78D00809C14AE5665906645" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_ED5599A3D78D00809C14AE5665906645" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_ED5599A3D78D00809C14AE5665906645" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_75C41E750514B9B868F1AE566590FFF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_75C41E750514B9B868F1AE566590FFF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember_8DE3B9C3BE9C383F066AAE566590963F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_267BD8E5438F4E1987BFAE566590F453" xlink:to="loc_us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember_8DE3B9C3BE9C383F066AAE566590963F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D5E197859C2A49C4070BAE566590A654" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D5E197859C2A49C4070BAE566590A654" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_504F93AA99671888C70DAE5665904765_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D5E197859C2A49C4070BAE566590A654" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_504F93AA99671888C70DAE5665904765_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_504F93AA99671888C70DAE5665904765" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D5E197859C2A49C4070BAE566590A654" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_504F93AA99671888C70DAE5665904765" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_1BA9687EA1F307DF5E4BAE5665905B14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_504F93AA99671888C70DAE5665904765" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_1BA9687EA1F307DF5E4BAE5665905B14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0BD050919EBA3BFA0959AE5665908026" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0BD050919EBA3BFA0959AE5665908026" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0BD050919EBA3BFA0959AE5665908026" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0BD050919EBA3BFA0959AE5665908026" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_4818F54C334F0F74C7AEAE566590D7D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_4818F54C334F0F74C7AEAE566590D7D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_CCA62102B9AB4E2C0D52AE566590BF1C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_CCA62102B9AB4E2C0D52AE566590BF1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_694C9B35462597DE8A69AE5665904BE4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_694C9B35462597DE8A69AE5665904BE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_442C8DB56E068677725AAE5665900C13" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_22440C087738327432F1AE566590EB3D" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_442C8DB56E068677725AAE5665900C13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5BC749EFD2E5733EF2DBAE566590CFF4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F048B108BF5B44F4FD72AE566580E25D" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5BC749EFD2E5733EF2DBAE566590CFF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5BC749EFD2E5733EF2DBAE566590CFF4" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_5BC749EFD2E5733EF2DBAE566590CFF4" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AuctionRateSecuritiesMember" xlink:label="loc_us-gaap_AuctionRateSecuritiesMember_59CAD1C25765975DA099AE56659020C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:to="loc_us-gaap_AuctionRateSecuritiesMember_59CAD1C25765975DA099AE56659020C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_2D4A5B57E6ADEB7D976AAE5665903CBE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_2D4A5B57E6ADEB7D976AAE5665903CBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_FE7C91709F5208B7A85AAE566590F572" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_FE7C91709F5208B7A85AAE566590F572" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_3997E9A2D0403621E287AE56659017E9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_78F5A49079E40C454E9CAE5665904964" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_3997E9A2D0403621E287AE56659017E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_3E80BC997B87E7AE806EAE5665903897" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_3E80BC997B87E7AE806EAE5665903897" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_506F515164EEAA073576AE566590D11E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:to="loc_us-gaap_LoansReceivableFairValueDisclosure_506F515164EEAA073576AE566590D11E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSaleFairValueDisclosure" xlink:label="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_6BE00FF8B91B4639BCF1AE566590C805" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:to="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_6BE00FF8B91B4639BCF1AE566590C805" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_244491D60AE1C0244D99AE5665909EDE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:to="loc_us-gaap_DerivativeAssets_244491D60AE1C0244D99AE5665909EDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_1E55E5A6E3D164E7F9B4AE5665909C47" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_F28C1DA60A9A3A144A6BAE566590BE9C" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_1E55E5A6E3D164E7F9B4AE5665909C47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_0951DA3B65A84D5725B6AE566590A9F0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_0951DA3B65A84D5725B6AE566590A9F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_FEE53F738FB683308146AE566590A0C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_0951DA3B65A84D5725B6AE566590A9F0" xlink:to="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_FEE53F738FB683308146AE566590A0C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_8DCCD4479B6058D4E2BBAE5665906E74" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_0951DA3B65A84D5725B6AE566590A9F0" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_8DCCD4479B6058D4E2BBAE5665906E74" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_AvailableForSaleSecuritiesNumberOfPositions" xlink:label="loc_efsc_AvailableForSaleSecuritiesNumberOfPositions_567C17EF3F0CEC0D7FD2AE56659082D9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_AvailableForSaleSecuritiesNumberOfPositions_567C17EF3F0CEC0D7FD2AE56659082D9" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSale" xlink:label="loc_efsc_StateTaxCreditsHeldForSale_353BF3D58DC59EFDB3D5AE566590E0CA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_StateTaxCreditsHeldForSale_353BF3D58DC59EFDB3D5AE566590E0CA" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_IncreaseInStateTaxCreditsCarriedAtFairValue" xlink:label="loc_efsc_IncreaseInStateTaxCreditsCarriedAtFairValue_1E1D108DC28D45BE277DAE566590BEC5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_IncreaseInStateTaxCreditsCarriedAtFairValue_1E1D108DC28D45BE277DAE566590BEC5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_DecreaseInStateTaxCreditsCarriedAtFairValue" xlink:label="loc_efsc_DecreaseInStateTaxCreditsCarriedAtFairValue_26D53259372E441FBCAEAE5665907226" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_DecreaseInStateTaxCreditsCarriedAtFairValue_26D53259372E441FBCAEAE5665907226" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditTerm" xlink:label="loc_efsc_StateTaxCreditTerm_2E75581AFB81B81B82B8AE566590C9C6" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_StateTaxCreditTerm_2E75581AFB81B81B82B8AE566590C9C6" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_YearsOfTaxCreditsGenerated" xlink:label="loc_efsc_YearsOfTaxCreditsGenerated_769B2FDA183AAD8EB754AE566590DEEA" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_YearsOfTaxCreditsGenerated_769B2FDA183AAD8EB754AE566590DEEA" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditFairValueInputDiscountRateBasisPointSpread" xlink:label="loc_efsc_StateTaxCreditFairValueInputDiscountRateBasisPointSpread_D9002A682EDAF3B41C9FAE56659014C5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4DBD619477B565E15064AE56659075BD" xlink:to="loc_efsc_StateTaxCreditFairValueInputDiscountRateBasisPointSpread_D9002A682EDAF3B41C9FAE56659014C5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/FairValueMeasurementsSummaryOfCarryingAmountsAndFairValuesOfCompanysFinancialInstrumentsOnConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_FF44AF5A0BDDB8F9AE24AE5703CE4A17" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_D0FED4619BDF6F351774AE5703CE21E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_FF44AF5A0BDDB8F9AE24AE5703CE4A17" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_D0FED4619BDF6F351774AE5703CE21E0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_C54B19A20C47AEF7F769AE5703CE3CA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_D0FED4619BDF6F351774AE5703CE21E0" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_C54B19A20C47AEF7F769AE5703CE3CA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_C54B19A20C47AEF7F769AE5703CE3CA2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_C54B19A20C47AEF7F769AE5703CE3CA2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3595E773DCD1AC7DD5DDAE5703CEC379" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3595E773DCD1AC7DD5DDAE5703CEC379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C095805AEA88192A0DC5AE5703CE591A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_23566BF3DA3397538D08AE5703CE3C23" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C095805AEA88192A0DC5AE5703CE591A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_FF44AF5A0BDDB8F9AE24AE5703CE4A17" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7A37096E75273885F34AAE5703CEC0A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7A37096E75273885F34AAE5703CEC0A6" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FederalFundsSoldFairValueDisclosure" xlink:label="loc_efsc_FederalFundsSoldFairValueDisclosure_84B333A4283B874D473DAE5703CEC4D7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_efsc_FederalFundsSoldFairValueDisclosure_84B333A4283B874D473DAE5703CEC4D7" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestBearingDepositsInBanksFairValueDisclosure" xlink:label="loc_efsc_InterestBearingDepositsInBanksFairValueDisclosure_CC7FB93E06157DCA94AFAE5703CE1EDA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_efsc_InterestBearingDepositsInBanksFairValueDisclosure_CC7FB93E06157DCA94AFAE5703CE1EDA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_6B92C49C717A0505F689AE5703CE40BD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_6B92C49C717A0505F689AE5703CE40BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostMethodInvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_CostMethodInvestmentsFairValueDisclosure_C6E529AEDAC8593D670DAE5703CE33DE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_us-gaap_CostMethodInvestmentsFairValueDisclosure_C6E529AEDAC8593D670DAE5703CE33DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:label="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_C60ABB100D29BCBD699CAE5703CEB966" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_C60ABB100D29BCBD699CAE5703CEB966" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_C3E7A57578DC42ACBC00AE5703CE82AE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_us-gaap_DerivativeAssets_C3E7A57578DC42ACBC00AE5703CE82AE" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure" xlink:label="loc_efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure_5A24C4FC45A8524F2D00AE5703DE9A4E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_efsc_LoansAndLeasesReceivableNetReportedAmountFairValueDisclosure_5A24C4FC45A8524F2D00AE5703DE9A4E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_StateTaxCreditsHeldForSaleFairValueDisclosure" xlink:label="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_B5FC8EAE53E77737000FAE5703DE9861" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_efsc_StateTaxCreditsHeldForSaleFairValueDisclosure_B5FC8EAE53E77737000FAE5703DE9861" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestReceivableFairValueDisclosure" xlink:label="loc_efsc_InterestReceivableFairValueDisclosure_AD6EA2C6D1EA2D8A72E2AE5703DEB05E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_1B13DA20F1E516A1A2DAAE5703CEEA57" xlink:to="loc_efsc_InterestReceivableFairValueDisclosure_AD6EA2C6D1EA2D8A72E2AE5703DEB05E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_FF44AF5A0BDDB8F9AE24AE5703CE4A17" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:label="loc_us-gaap_DepositsFairValueDisclosure_8C34B8689C9BCE4B0CE5AE5703DEEF84" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_us-gaap_DepositsFairValueDisclosure_8C34B8689C9BCE4B0CE5AE5703DEEF84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_7DAA6D56B2541512B037AE5703DEEB2A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_7DAA6D56B2541512B037AE5703DEEB2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure" xlink:label="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_062DA16EA94607EA965DAE5703DE2547" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_062DA16EA94607EA965DAE5703DE2547" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_OtherBorrowingsFairValueDisclosure" xlink:label="loc_efsc_OtherBorrowingsFairValueDisclosure_BE3ABF6F1803359FCF63AE5703DEAF6F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_efsc_OtherBorrowingsFairValueDisclosure_BE3ABF6F1803359FCF63AE5703DEAF6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_87BE62F86CA830926458AE5703DEA7D5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure_87BE62F86CA830926458AE5703DEA7D5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_InterestPayableFairValueDisclosure" xlink:label="loc_efsc_InterestPayableFairValueDisclosure_50C968583E1B5CB20BA3AE5703DE485D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_68BD3841A34CABED56C3AE5703DEE562" xlink:to="loc_efsc_InterestPayableFairValueDisclosure_50C968583E1B5CB20BA3AE5703DE485D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/InvestmentsScheduleOfAvailableForSaleSecuritiesReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_89AEC98956BDBC2845292B867AD1FAD7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_89AEC98956BDBC2845292B867AD1FAD7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1B019E37CF7D86DB1E5A2B867AD12C27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_89AEC98956BDBC2845292B867AD1FAD7" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1B019E37CF7D86DB1E5A2B867AD12C27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1B019E37CF7D86DB1E5A2B867AD12C27" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1B019E37CF7D86DB1E5A2B867AD12C27" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_C04D6D45D22D4B4238BF2B867AD16970" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_C04D6D45D22D4B4238BF2B867AD16970" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_6813A73A384B40C723782B867AD124F8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_6813A73A384B40C723782B867AD124F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_07A6C9BA263C3CCF6A262B867AD11A48" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_1D9E7DF37308CE1043D42B867AD19487" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_07A6C9BA263C3CCF6A262B867AD11A48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost_F61A2BAA97DF7FB53A4B2B867AD13E86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost_F61A2BAA97DF7FB53A4B2B867AD13E86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain_FE1B6EBFB5D1802225092B867AD13A3B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain_FE1B6EBFB5D1802225092B867AD13A3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1_5081D6C2A582A911AFDB2B867AD1705B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1_5081D6C2A582A911AFDB2B867AD1705B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_01BE88A0D8D05FE27ABD2B867AD164A0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0D335518CAEE7C7CE7532B867AD1D933" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_01BE88A0D8D05FE27ABD2B867AD164A0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/InvestmentsScheduleOfUnrealizedLossOnInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_CEC2F5A7A5AE67B390652B867B5E57DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_CEC2F5A7A5AE67B390652B867B5E57DA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_628AA6B2A712905B38A02B867B5ED7ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_CEC2F5A7A5AE67B390652B867B5E57DA" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_628AA6B2A712905B38A02B867B5ED7ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_628AA6B2A712905B38A02B867B5ED7ED" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_628AA6B2A712905B38A02B867B5ED7ED" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_A02E10800774561471732B867B5E075E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_A02E10800774561471732B867B5E075E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_30CA6A95FF6E49DB88BF2B867B5EAB6D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_30CA6A95FF6E49DB88BF2B867B5EAB6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_640F57E6F60F2DB4AD1A2B867B5E6682" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_9ED263DB55E5FB4C508C2B867B5E26E7" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_640F57E6F60F2DB4AD1A2B867B5E6682" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_CBEB2047209226E640B72B867B5ECE22" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_CBEB2047209226E640B72B867B5ECE22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2_C0169DE9488DA6E338D32B867B5E12BD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2_C0169DE9488DA6E338D32B867B5E12BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_E37891FABCFA3637157A2B867B5E5F56" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_E37891FABCFA3637157A2B867B5E5F56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2_1FBE152907980D8276C32B867B5E3F6F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2_1FBE152907980D8276C32B867B5E3F6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_9C8B05E8B9022029B3EF2B867B5E43BC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_9C8B05E8B9022029B3EF2B867B5E43BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2_8B87E79C6DECF42C1E002B867B5E4C15" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8E34F8C1764A7902011C2B867B5E5275" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2_8B87E79C6DECF42C1E002B867B5E4C15" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansAllowanceForCreditLossesOnFinancingReceivablesDetails" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansLineItems" xlink:label="loc_efsc_CoveredLoansLineItems_231F8C6790CE614169E22B867B9C9003" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansTable" xlink:label="loc_efsc_CoveredLoansTable_BD3F819BCD3235EA7F742B867B9CC33B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_CoveredLoansLineItems_231F8C6790CE614169E22B867B9C9003" xlink:to="loc_efsc_CoveredLoansTable_BD3F819BCD3235EA7F742B867B9CC33B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_B25DFE90C5BEFC21B81B2B867B9CF682" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_BD3F819BCD3235EA7F742B867B9CC33B" xlink:to="loc_efsc_LoansByMajorCategoryAxis_B25DFE90C5BEFC21B81B2B867B9CF682" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_7F5FD1AF6471EC5A2AFD2B867B9C4A52_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_B25DFE90C5BEFC21B81B2B867B9CF682" xlink:to="loc_efsc_LoansByMajorCategoryDomain_7F5FD1AF6471EC5A2AFD2B867B9C4A52_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_7F5FD1AF6471EC5A2AFD2B867B9C4A52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_B25DFE90C5BEFC21B81B2B867B9CF682" xlink:to="loc_efsc_LoansByMajorCategoryDomain_7F5FD1AF6471EC5A2AFD2B867B9C4A52" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansMember" xlink:label="loc_efsc_CoveredLoansMember_76D22E391296777D58702B867B9CE537" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_7F5FD1AF6471EC5A2AFD2B867B9C4A52" xlink:to="loc_efsc_CoveredLoansMember_76D22E391296777D58702B867B9CE537" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward" xlink:label="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_231F8C6790CE614169E22B867B9C9003" xlink:to="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowanceCovered" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowanceCovered_FC56F5D4AF829471B2AF2B867B9C5616" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:to="loc_us-gaap_LoansAndLeasesReceivableAllowanceCovered_FC56F5D4AF829471B2AF2B867B9C5616" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesProvisionForLossGross" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesProvisionForLossGross_261568671127E20C67052B867B9CC5A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:to="loc_us-gaap_AllowanceForLoanAndLeaseLossesProvisionForLossGross_261568671127E20C67052B867B9CC5A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_3F91512AE63638693B092B867B9C0028" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:to="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_3F91512AE63638693B092B867B9C0028" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts_FA19F171BD674FF57BAC2B867B9C1C46" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:to="loc_us-gaap_AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts_FA19F171BD674FF57BAC2B867B9C1C46" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_AllowanceForLoanAndLeaseLossesOtherIncreasesDecreases" xlink:label="loc_efsc_AllowanceForLoanAndLeaseLossesOtherIncreasesDecreases_5B84EC25D0704E5BB7642B867B9C89A0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesForCoveredLoansRollForward_2FA1A28D66724AE3B9312B867B9C0C3F" xlink:to="loc_efsc_AllowanceForLoanAndLeaseLossesOtherIncreasesDecreases_5B84EC25D0704E5BB7642B867B9C89A0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfAgingOfRecordedInvestmentInPastDueCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable" xlink:label="loc_efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable_B0F876585CE51471F3A72B867B001152" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable_B0F876585CE51471F3A72B867B001152" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_D232674052BCD18CA99D2B867B00454F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable_B0F876585CE51471F3A72B867B001152" xlink:to="loc_efsc_LoansByMajorCategoryAxis_D232674052BCD18CA99D2B867B00454F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_707B63A0D4919AF5CC952B867B000116_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_D232674052BCD18CA99D2B867B00454F" xlink:to="loc_efsc_LoansByMajorCategoryDomain_707B63A0D4919AF5CC952B867B000116_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_707B63A0D4919AF5CC952B867B000116" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_D232674052BCD18CA99D2B867B00454F" xlink:to="loc_efsc_LoansByMajorCategoryDomain_707B63A0D4919AF5CC952B867B000116" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansMember" xlink:label="loc_efsc_CoveredLoansMember_48905A6C0719B06284AF2B867B001A10" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_707B63A0D4919AF5CC952B867B000116" xlink:to="loc_efsc_CoveredLoansMember_48905A6C0719B06284AF2B867B001A10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_02A1C0DFFEBB5A6265DA2B867B0041FB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable_B0F876585CE51471F3A72B867B001152" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_02A1C0DFFEBB5A6265DA2B867B0041FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_02A1C0DFFEBB5A6265DA2B867B0041FB" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_02A1C0DFFEBB5A6265DA2B867B0041FB" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_46953957BAC3A72F9C4F2B867B10C908" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_46953957BAC3A72F9C4F2B867B10C908" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_C921A47459D64AA0109B2B867B1042B6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_C921A47459D64AA0109B2B867B1042B6" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_3BB07B1AF8FBF53D48BF2B867B104255" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_183A50227691CA3ED2AA2B867B00951A" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_3BB07B1AF8FBF53D48BF2B867B104255" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_37BCDFC4D5152A4556152B867B107F0F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesPastDueRecordedInvestmentTable_B0F876585CE51471F3A72B867B001152" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_37BCDFC4D5152A4556152B867B107F0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_37BCDFC4D5152A4556152B867B107F0F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_37BCDFC4D5152A4556152B867B107F0F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_34500E813B8C52B8ED252B867B10F5C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_34500E813B8C52B8ED252B867B10F5C3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_0D0B606EDCDD9E29A8972B867B10D0D3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_0D0B606EDCDD9E29A8972B867B10D0D3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_7E060E8549D999F937722B867B100DAD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_7E060E8549D999F937722B867B100DAD" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_D92ABF750CDCE92E56AE2B867B1084E0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DDFA5DDC136C6FC0EF9A2B867B10D756" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_D92ABF750CDCE92E56AE2B867B1084E0" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue" xlink:label="loc_efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue_66182DFA4188E51273602B867B10D5D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue_66182DFA4188E51273602B867B10D5D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue_F052001BF9C8DA7612AF2B867B10A039" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue_F052001BF9C8DA7612AF2B867B10A039" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_BD6B5B10272B6E31FDE82B867B10B695" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_BD6B5B10272B6E31FDE82B867B10B695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_0856A1472BFE91C205322B867B109DF0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_0856A1472BFE91C205322B867B109DF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesReceivableGross" xlink:label="loc_us-gaap_NotesReceivableGross_2AF54D541FC1071913B02B867B1008BC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_A060EA8281E3C656EFBC2B867B10C095" xlink:to="loc_us-gaap_NotesReceivableGross_2AF54D541FC1071913B02B867B1008BC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansSummaryOfCoveredLoansByCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansLineItems" xlink:label="loc_efsc_CoveredLoansLineItems_FC37ACDE8D0C26B202B8C22E9C823021" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansTable" xlink:label="loc_efsc_CoveredLoansTable_DEDFA050722D4A199E40C22E9C824F08" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_CoveredLoansLineItems_FC37ACDE8D0C26B202B8C22E9C823021" xlink:to="loc_efsc_CoveredLoansTable_DEDFA050722D4A199E40C22E9C824F08" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_5BBDF51C8B0EFA66A8BAC22E9C82AA87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_DEDFA050722D4A199E40C22E9C824F08" xlink:to="loc_efsc_LoansByMajorCategoryAxis_5BBDF51C8B0EFA66A8BAC22E9C82AA87" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_BAD6E3DE994B097359CBC22E9C824336_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_5BBDF51C8B0EFA66A8BAC22E9C82AA87" xlink:to="loc_efsc_LoansByMajorCategoryDomain_BAD6E3DE994B097359CBC22E9C824336_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_BAD6E3DE994B097359CBC22E9C824336" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_5BBDF51C8B0EFA66A8BAC22E9C82AA87" xlink:to="loc_efsc_LoansByMajorCategoryDomain_BAD6E3DE994B097359CBC22E9C824336" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansMember" xlink:label="loc_efsc_CoveredLoansMember_98464C48AFA1F1D7F668C22E9C823FB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_BAD6E3DE994B097359CBC22E9C824336" xlink:to="loc_efsc_CoveredLoansMember_98464C48AFA1F1D7F668C22E9C823FB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_9710EF437E4ACA28B4A1C22E9C82D0ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_DEDFA050722D4A199E40C22E9C824F08" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_9710EF437E4ACA28B4A1C22E9C82D0ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_9710EF437E4ACA28B4A1C22E9C82D0ED" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_9710EF437E4ACA28B4A1C22E9C82D0ED" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_9A36FFFFFB1E4279468FC22E9C82761F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_9A36FFFFFB1E4279468FC22E9C82761F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_BC3163C96F6796A5EE76C22E9C820C65" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_BC3163C96F6796A5EE76C22E9C820C65" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_EAD664BA075BF1136903C22E9C827E41" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_5EABAB85AC57DAA50C9BC22E9C82205F" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_EAD664BA075BF1136903C22E9C827E41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_F6B31A757E67C3FAE3B5C22E9C825ED2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_DEDFA050722D4A199E40C22E9C824F08" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_F6B31A757E67C3FAE3B5C22E9C825ED2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_F6B31A757E67C3FAE3B5C22E9C825ED2" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_F6B31A757E67C3FAE3B5C22E9C825ED2" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_AB580CBC58E5053ECE7FC22E9C828176" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_AB580CBC58E5053ECE7FC22E9C828176" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2FD89422AF05891D4459C22E9C82CD89" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2FD89422AF05891D4459C22E9C82CD89" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_FCC9DD968308B4176273C22E9C82B10D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_FCC9DD968308B4176273C22E9C82B10D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_A8EDA31048ACC7CC181EC22E9C82D066" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_DE2E6835A0ECAB582E58C22E9C82ACE8" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_A8EDA31048ACC7CC181EC22E9C82D066" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_WeightedAverageRiskRating" xlink:label="loc_efsc_WeightedAverageRiskRating_A1B4D44721D95CC79CA9C22E9C82174D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_FC37ACDE8D0C26B202B8C22E9C823021" xlink:to="loc_efsc_WeightedAverageRiskRating_A1B4D44721D95CC79CA9C22E9C82174D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered_EEDF007457FB2ED45EADC22E9C822BD3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_FC37ACDE8D0C26B202B8C22E9C823021" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered_EEDF007457FB2ED45EADC22E9C822BD3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansPurchasedFromFdicOutstandingBalance" xlink:label="loc_efsc_LoansPurchasedFromFdicOutstandingBalance_C27B8B22E772CD3507DCC2304266A24B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_FC37ACDE8D0C26B202B8C22E9C823021" xlink:to="loc_efsc_LoansPurchasedFromFdicOutstandingBalance_C27B8B22E772CD3507DCC2304266A24B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansCoveredByLossShareCoveredLoansTables" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansLineItems" xlink:label="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansTable" xlink:label="loc_efsc_CoveredLoansTable_0493C8A88E458CEBE1E52B867B1F4F20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:to="loc_efsc_CoveredLoansTable_0493C8A88E458CEBE1E52B867B1F4F20" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_1C39D5E5391F4E5C1D672B867B1FB0A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_0493C8A88E458CEBE1E52B867B1F4F20" xlink:to="loc_efsc_LoansByMajorCategoryAxis_1C39D5E5391F4E5C1D672B867B1FB0A2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_AC48282C8A415EB10F752B867B1FE07E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_1C39D5E5391F4E5C1D672B867B1FB0A2" xlink:to="loc_efsc_LoansByMajorCategoryDomain_AC48282C8A415EB10F752B867B1FE07E_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_AC48282C8A415EB10F752B867B1FE07E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_1C39D5E5391F4E5C1D672B867B1FB0A2" xlink:to="loc_efsc_LoansByMajorCategoryDomain_AC48282C8A415EB10F752B867B1FE07E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansMember" xlink:label="loc_efsc_CoveredLoansMember_E2676440E867660AE0202B867B1FBAE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_AC48282C8A415EB10F752B867B1FE07E" xlink:to="loc_efsc_CoveredLoansMember_E2676440E867660AE0202B867B1FBAE7" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfCoveredLoansByCategoryTableTextBlock" xlink:label="loc_efsc_SummaryOfCoveredLoansByCategoryTableTextBlock_7C754DE180BFD9728D5C2B867B1F56E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:to="loc_efsc_SummaryOfCoveredLoansByCategoryTableTextBlock_7C754DE180BFD9728D5C2B867B1F56E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_79F2FF332013698896692B867B1FBFB8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:to="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_79F2FF332013698896692B867B1FBFB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_04DB5CFC752AD9C2E8C22B867B1FA633" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:to="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_04DB5CFC752AD9C2E8C22B867B1FA633" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfChangesInAccretableYieldForPurchasedLoansTableTextBlock" xlink:label="loc_efsc_SummaryOfChangesInAccretableYieldForPurchasedLoansTableTextBlock_5C612DCE88C9965C19B52B867B1FA952" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_CFAE4AA602D70E5DE99E2B867B1F3755" xlink:to="loc_efsc_SummaryOfChangesInAccretableYieldForPurchasedLoansTableTextBlock_5C612DCE88C9965C19B52B867B1FA952" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAgingOfRecordedInvestmentInPastDueNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_ACBC988B2A2207B070C92B867BFA3290" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_ACBC988B2A2207B070C92B867BFA3290" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_50256C71FE4B918521102B867BFAAC28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_ACBC988B2A2207B070C92B867BFA3290" xlink:to="loc_efsc_LoansByMajorCategoryAxis_50256C71FE4B918521102B867BFAAC28" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_E042F2E4975DBE74B8D62B867BFA390F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_50256C71FE4B918521102B867BFAAC28" xlink:to="loc_efsc_LoansByMajorCategoryDomain_E042F2E4975DBE74B8D62B867BFA390F_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_E042F2E4975DBE74B8D62B867BFA390F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_50256C71FE4B918521102B867BFAAC28" xlink:to="loc_efsc_LoansByMajorCategoryDomain_E042F2E4975DBE74B8D62B867BFA390F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_FE63D12240FA765958512B867BFA61DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_E042F2E4975DBE74B8D62B867BFA390F" xlink:to="loc_efsc_NoncoveredLoansMember_FE63D12240FA765958512B867BFA61DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_AF156AE07AE92DCD49072B867BFA1355" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_ACBC988B2A2207B070C92B867BFA3290" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_AF156AE07AE92DCD49072B867BFA1355" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_AF156AE07AE92DCD49072B867BFA1355" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_AF156AE07AE92DCD49072B867BFA1355" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_53BE90F254DE363021C32B867BFA1539" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_53BE90F254DE363021C32B867BFA1539" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_D0FCA4B8F0EFC0384BFB2B867BFAD879" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_D0FCA4B8F0EFC0384BFB2B867BFAD879" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_7B9D53EBC908397BF38F2B867BFA5BC7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_FCAD2C3F9B0FDCA375E12B867BFAC460" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_7B9D53EBC908397BF38F2B867BFA5BC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_A7D3382B17DCE37C1C242B867BFAD1D4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_ACBC988B2A2207B070C92B867BFA3290" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_A7D3382B17DCE37C1C242B867BFAD1D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_A7D3382B17DCE37C1C242B867BFAD1D4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_A7D3382B17DCE37C1C242B867BFAD1D4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_A7012F86B0C06D65DEE72B867BFAE137" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_A7012F86B0C06D65DEE72B867BFAE137" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_FE0F0E2362E6AA0C81282B867BFA9D0F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_FE0F0E2362E6AA0C81282B867BFA9D0F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_45C6A8DAA14F685B3A3B2B867BFA462B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_45C6A8DAA14F685B3A3B2B867BFA462B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_699530C07A9EE80850002B867BFA0744" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B3C60F35AC7D973EB2752B867BFA05C7" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_699530C07A9EE80850002B867BFA0744" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue" xlink:label="loc_efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue_BC8F35C847870CDDD26D2B867BFA4763" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_efsc_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue_BC8F35C847870CDDD26D2B867BFA4763" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue_434C2CD904579E52D8E22B867BFAE0F0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue_434C2CD904579E52D8E22B867BFAE0F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_5F63A8CEBC4A389A4BC02B867BFAE211" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_5F63A8CEBC4A389A4BC02B867BFAE211" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_36D9EFD2FE84AC8124C22B867BFAF860" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_36D9EFD2FE84AC8124C22B867BFAF860" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesReceivableGross" xlink:label="loc_us-gaap_NotesReceivableGross_F2478D708D923A1CAEB72B867BFA21E9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_NotesReceivableGross_F2478D708D923A1CAEB72B867BFA21E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_7F8F81C1E309E7C1B0392B867BFA1027" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_F91849A228DD366E4E252B867BFA407D" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_7F8F81C1E309E7C1B0392B867BFA1027" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfAllowanceForLoanLossesForNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems" xlink:label="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_0A77805A4A484D0C3076993CE81FE28F" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable" xlink:label="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_D7539C41E909A7CD0170993CE81F36B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_0A77805A4A484D0C3076993CE81FE28F" xlink:to="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_D7539C41E909A7CD0170993CE81F36B4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_4A41FAEEA4F799237FAD993CE81F63F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_D7539C41E909A7CD0170993CE81F36B4" xlink:to="loc_efsc_LoansByMajorCategoryAxis_4A41FAEEA4F799237FAD993CE81F63F8" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_64A0C1E21CD41A01A89E993CE81F5635_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_4A41FAEEA4F799237FAD993CE81F63F8" xlink:to="loc_efsc_LoansByMajorCategoryDomain_64A0C1E21CD41A01A89E993CE81F5635_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_64A0C1E21CD41A01A89E993CE81F5635" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_4A41FAEEA4F799237FAD993CE81F63F8" xlink:to="loc_efsc_LoansByMajorCategoryDomain_64A0C1E21CD41A01A89E993CE81F5635" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_85238D677382A792CBAD993CE81F2150" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_64A0C1E21CD41A01A89E993CE81F5635" xlink:to="loc_efsc_NoncoveredLoansMember_85238D677382A792CBAD993CE81F2150" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_5866626063617A313846993CE81FB680" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_D7539C41E909A7CD0170993CE81F36B4" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_5866626063617A313846993CE81FB680" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_5866626063617A313846993CE81FB680" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_5866626063617A313846993CE81FB680" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_23F8A0DCC3CFE4FF2D5E993CE81F3C33" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_23F8A0DCC3CFE4FF2D5E993CE81F3C33" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_4F7749C3E46D976BDF5F993CE81FBEC4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_4F7749C3E46D976BDF5F993CE81FBEC4" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_13B34748D3AA5DDCE300993CE81F5A53" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_13B34748D3AA5DDCE300993CE81F5A53" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_QualitativeAdjustmentPortfolioSegmentMember" xlink:label="loc_efsc_QualitativeAdjustmentPortfolioSegmentMember_7C088D26759CA73FD829993CE81F0BF1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_298D7947C3160A68518F993CE81F8E9E" xlink:to="loc_efsc_QualitativeAdjustmentPortfolioSegmentMember_7C088D26759CA73FD829993CE81F0BF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_3C6A04CB355F5A243B10993CE81F3C2F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_D7539C41E909A7CD0170993CE81F36B4" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_3C6A04CB355F5A243B10993CE81F3C2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_3C6A04CB355F5A243B10993CE81F3C2F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_3C6A04CB355F5A243B10993CE81F3C2F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_081E58DFE03BB7E3D780993CE81F7124" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_081E58DFE03BB7E3D780993CE81F7124" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_0052D2A8A34E51F972AD993CE81F244F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_0052D2A8A34E51F972AD993CE81F244F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_3717BF9C450E501F5B0D993CE81F285D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_3717BF9C450E501F5B0D993CE81F285D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_E3843AD31165A4ED9C02993CE81FDC1C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_E548F9051D62E51E8775993CE81FA17F" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_E3843AD31165A4ED9C02993CE81FDC1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfActivityInAllowanceForLoanLossesByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_0A77805A4A484D0C3076993CE81FE28F" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_3E474EA9EEA00CCB9AE5993CE81F9EE2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_3E474EA9EEA00CCB9AE5993CE81F9EE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_F56081EB05B45951297A993CE81F78DA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_F56081EB05B45951297A993CE81F78DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_6CA6A1EDE820FF30CB05993CE81F7B71" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_6CA6A1EDE820FF30CB05993CE81F7B71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_1413312176C7A7E96CCD993CE81FA2CF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_1F9C01BA77AB999B4C60993CE81F4CB2" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_1413312176C7A7E96CCD993CE81FA2CF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansByCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_D4D581C7B4302160980F2B867AF097AB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_ABB2CE222AEB97A7BCC02B867AF0F45F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_D4D581C7B4302160980F2B867AF097AB" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_ABB2CE222AEB97A7BCC02B867AF0F45F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_9FCD62F3F9A31E0DD3212B867AF0AF71" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_ABB2CE222AEB97A7BCC02B867AF0F45F" xlink:to="loc_efsc_LoansByMajorCategoryAxis_9FCD62F3F9A31E0DD3212B867AF0AF71" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_DEEC5BA3BB75340CFD442B867AF02F30_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_9FCD62F3F9A31E0DD3212B867AF0AF71" xlink:to="loc_efsc_LoansByMajorCategoryDomain_DEEC5BA3BB75340CFD442B867AF02F30_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_DEEC5BA3BB75340CFD442B867AF02F30" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_9FCD62F3F9A31E0DD3212B867AF0AF71" xlink:to="loc_efsc_LoansByMajorCategoryDomain_DEEC5BA3BB75340CFD442B867AF02F30" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_C84DE0DBC084235CBFA32B867AF033B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_DEEC5BA3BB75340CFD442B867AF02F30" xlink:to="loc_efsc_NoncoveredLoansMember_C84DE0DBC084235CBFA32B867AF033B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_21895AFA4679515488202B867AF04A58" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_ABB2CE222AEB97A7BCC02B867AF0F45F" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_21895AFA4679515488202B867AF04A58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_21895AFA4679515488202B867AF04A58" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_21895AFA4679515488202B867AF04A58" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_C7C01405F7A4D0D544D52B867AF083B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_C7C01405F7A4D0D544D52B867AF083B4" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_D32F06AF8B099BA96C722B867AF02E8C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_D32F06AF8B099BA96C722B867AF02E8C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_BD5633C4BC48689F70E92B867AF08221" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_07AE26A5D1A2EDE70A9F2B867AF020F3" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_BD5633C4BC48689F70E92B867AF08221" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_BD9C5363F63F40D61E692B867AF03B33" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_ABB2CE222AEB97A7BCC02B867AF0F45F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_BD9C5363F63F40D61E692B867AF03B33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_BD9C5363F63F40D61E692B867AF03B33" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_BD9C5363F63F40D61E692B867AF03B33" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_909E40906FCBA44FABE12B867AF0A7E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_909E40906FCBA44FABE12B867AF0A7E5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_150EE161ADE6B625AB302B867AF08EEB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_150EE161ADE6B625AB302B867AF08EEB" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_07DC9D05443911D9C8512B867AF0B67A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_07DC9D05443911D9C8512B867AF0B67A" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_C9FB4A18E627245E40372B867AF0BA61" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_5BF2FC70D0885D4A01702B867AF0C8FB" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_C9FB4A18E627245E40372B867AF0BA61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesReceivableGross" xlink:label="loc_us-gaap_NotesReceivableGross_C9488B39404F60687A502B867AF0A101" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_D4D581C7B4302160980F2B867AF097AB" xlink:to="loc_us-gaap_NotesReceivableGross_C9488B39404F60687A502B867AF0A101" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" xlink:label="loc_us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_723CBE9222B5CBC1F81F2B867AF03EEA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_D4D581C7B4302160980F2B867AF097AB" xlink:to="loc_us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_723CBE9222B5CBC1F81F2B867AF03EEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_B9BFC9A2836CB2A7B05C2B867AF09CA1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_D4D581C7B4302160980F2B867AF097AB" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_B9BFC9A2836CB2A7B05C2B867AF09CA1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfNonCoveredLoansIndividuallyEvaluatedForImpairmentByCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableImpairedLineItems" xlink:label="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfImpairedFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_CDC9548350B598B8ECA72B867C4859FF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_CDC9548350B598B8ECA72B867C4859FF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_B95A67FEF6DC818B370F2B867C485581" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_CDC9548350B598B8ECA72B867C4859FF" xlink:to="loc_efsc_LoansByMajorCategoryAxis_B95A67FEF6DC818B370F2B867C485581" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_663E36E941AB576FE79F2B867C480520_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_B95A67FEF6DC818B370F2B867C485581" xlink:to="loc_efsc_LoansByMajorCategoryDomain_663E36E941AB576FE79F2B867C480520_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_663E36E941AB576FE79F2B867C480520" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_B95A67FEF6DC818B370F2B867C485581" xlink:to="loc_efsc_LoansByMajorCategoryDomain_663E36E941AB576FE79F2B867C480520" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_4AB6206E122AF5F4E00D2B867C483AF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_663E36E941AB576FE79F2B867C480520" xlink:to="loc_efsc_NoncoveredLoansMember_4AB6206E122AF5F4E00D2B867C483AF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_C0D53E1BC81584DC6C622B867C483B33" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_CDC9548350B598B8ECA72B867C4859FF" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_C0D53E1BC81584DC6C622B867C483B33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_C0D53E1BC81584DC6C622B867C483B33" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_C0D53E1BC81584DC6C622B867C483B33" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_E9082285E0906913E61B2B867C483ED4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_E9082285E0906913E61B2B867C483ED4" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_8C4422FCE0161AA158272B867C48AB12" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_8C4422FCE0161AA158272B867C48AB12" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_ED3720DD9EB5541030012B867C489148" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_33A324A81D1FC81922D22B867C483526" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_ED3720DD9EB5541030012B867C489148" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_1ED3CCC1110A09957CDE2B867C48CE65" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_CDC9548350B598B8ECA72B867C4859FF" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_1ED3CCC1110A09957CDE2B867C48CE65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_1ED3CCC1110A09957CDE2B867C48CE65" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_1ED3CCC1110A09957CDE2B867C48CE65" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_AE8C820AF17BCE61A2B62B867C489082" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_AE8C820AF17BCE61A2B62B867C489082" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2D66A51549F017F0FC222B867C481400" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2D66A51549F017F0FC222B867C481400" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_76ECF90BCBFBFACFF7922B867C48C705" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_76ECF90BCBFBFACFF7922B867C48C705" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_289521CF8A9B0FD3AFAF2B867C482992" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FC4F44C363B3BA8860C42B867C48C3D0" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_289521CF8A9B0FD3AFAF2B867C482992" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_0B33F103EDAAEE2C66AA2B867C485FB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_0B33F103EDAAEE2C66AA2B867C485FB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_712D729A44792FC499902B867C48BBCD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_712D729A44792FC499902B867C48BBCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_0E6488741B7B1A4C7F9F2B867C486310" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_0E6488741B7B1A4C7F9F2B867C486310" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_1735BCD2D86F644C35B52B867C48CD72" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_1735BCD2D86F644C35B52B867C48CD72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_866E44EEEDD123BF84CD2B867C48A7DD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_866E44EEEDD123BF84CD2B867C48A7DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BE4D74A660CF56E6A90E2B867C486D3E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_215A0B6962BB7A8527932B867C48C71C" xlink:to="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BE4D74A660CF56E6A90E2B867C486D3E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredAndSubsequentlyDefaultedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableModificationsLineItems" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_5DE6E3A9A6767FD196BE2B867B3EAD27" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E1817174F499BF833EAC2B867B2F219E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_5DE6E3A9A6767FD196BE2B867B3EAD27" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E1817174F499BF833EAC2B867B2F219E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_76256FBE9C5D68F95CBE2B867B2F6452" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E1817174F499BF833EAC2B867B2F219E" xlink:to="loc_efsc_LoansByMajorCategoryAxis_76256FBE9C5D68F95CBE2B867B2F6452" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_4083328A4B4ABE92CB962B867B2F9B34_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_76256FBE9C5D68F95CBE2B867B2F6452" xlink:to="loc_efsc_LoansByMajorCategoryDomain_4083328A4B4ABE92CB962B867B2F9B34_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_4083328A4B4ABE92CB962B867B2F9B34" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_76256FBE9C5D68F95CBE2B867B2F6452" xlink:to="loc_efsc_LoansByMajorCategoryDomain_4083328A4B4ABE92CB962B867B2F9B34" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_61382806C0D60DE7B9652B867B2F1720" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_4083328A4B4ABE92CB962B867B2F9B34" xlink:to="loc_efsc_NoncoveredLoansMember_61382806C0D60DE7B9652B867B2F1720" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_4A656DB9B8CCCF7EF3102B867B2FA367" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E1817174F499BF833EAC2B867B2F219E" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_4A656DB9B8CCCF7EF3102B867B2FA367" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_4A656DB9B8CCCF7EF3102B867B2FA367" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_4A656DB9B8CCCF7EF3102B867B2FA367" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_47B78E20D7077CF7E5362B867B3E0423" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_47B78E20D7077CF7E5362B867B3E0423" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_33359508CE34B106FD712B867B3E4988" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_33359508CE34B106FD712B867B3E4988" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_559DF30D38953966965E2B867B3EDC9C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_0C576B473AAC08DF1BD42B867B3E97FB" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_559DF30D38953966965E2B867B3EDC9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_51B563A3EC77B77352512B867B3E0DDE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E1817174F499BF833EAC2B867B2F219E" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_51B563A3EC77B77352512B867B3E0DDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_51B563A3EC77B77352512B867B3E0DDE" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_51B563A3EC77B77352512B867B3E0DDE" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_EFF0FB232FF83AB507E22B867B3EBD22" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_EFF0FB232FF83AB507E22B867B3EBD22" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_4FD311ED6E81969F8A3D2B867B3EA41E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_4FD311ED6E81969F8A3D2B867B3EA41E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_06CD3BB183408620273A2B867B3E80D1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_06CD3BB183408620273A2B867B3E80D1" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_9497AFD0B094D5BD5F192B867B3E2E13" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_F6A69C0D9376793966132B867B3EA5D2" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_9497AFD0B094D5BD5F192B867B3E2E13" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" xlink:label="loc_efsc_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_04B34EBA59592B23555D2B867B3EA89E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_5DE6E3A9A6767FD196BE2B867B3EAD27" xlink:to="loc_efsc_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_04B34EBA59592B23555D2B867B3EA89E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1" xlink:label="loc_efsc_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_9DDCB0904AD8F1E4E4EC2B867B3EE5E8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_5DE6E3A9A6767FD196BE2B867B3EAD27" xlink:to="loc_efsc_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_9DDCB0904AD8F1E4E4EC2B867B3EE5E8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByCategoryOfNonCoveredLoansRestructuredDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableModificationsLineItems" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoanRestructuredStatusAxis" xlink:label="loc_efsc_LoanRestructuredStatusAxis_56A709FD8E19092D89472B867BAC290F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:to="loc_efsc_LoanRestructuredStatusAxis_56A709FD8E19092D89472B867BAC290F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoanRestructuredStatusDomain" xlink:label="loc_efsc_LoanRestructuredStatusDomain_4B24597B3117D939FB9B2B867BAC1795_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoanRestructuredStatusAxis_56A709FD8E19092D89472B867BAC290F" xlink:to="loc_efsc_LoanRestructuredStatusDomain_4B24597B3117D939FB9B2B867BAC1795_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoanRestructuredStatusDomain" xlink:label="loc_efsc_LoanRestructuredStatusDomain_4B24597B3117D939FB9B2B867BAC1795" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoanRestructuredStatusAxis_56A709FD8E19092D89472B867BAC290F" xlink:to="loc_efsc_LoanRestructuredStatusDomain_4B24597B3117D939FB9B2B867BAC1795" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RestructuredLoanMember" xlink:label="loc_efsc_RestructuredLoanMember_EF1A395E4858AD2291A32B867BAC2C0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoanRestructuredStatusDomain_4B24597B3117D939FB9B2B867BAC1795" xlink:to="loc_efsc_RestructuredLoanMember_EF1A395E4858AD2291A32B867BAC2C0E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_2B98674B9EF40A9315072B867BAC5105" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:to="loc_efsc_LoansByMajorCategoryAxis_2B98674B9EF40A9315072B867BAC5105" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_774100446E5A6AE539C42B867BAC88B5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_2B98674B9EF40A9315072B867BAC5105" xlink:to="loc_efsc_LoansByMajorCategoryDomain_774100446E5A6AE539C42B867BAC88B5_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_774100446E5A6AE539C42B867BAC88B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_2B98674B9EF40A9315072B867BAC5105" xlink:to="loc_efsc_LoansByMajorCategoryDomain_774100446E5A6AE539C42B867BAC88B5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_56F6908AFEFE39D6A4652B867BAC93AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_774100446E5A6AE539C42B867BAC88B5" xlink:to="loc_efsc_NoncoveredLoansMember_56F6908AFEFE39D6A4652B867BAC93AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_E0700D62F52ABEEC455D2B867BAC6000" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_E0700D62F52ABEEC455D2B867BAC6000" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_E0700D62F52ABEEC455D2B867BAC6000" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_E0700D62F52ABEEC455D2B867BAC6000" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_E6F383FC4EEE45849D3E2B867BAC8191" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_E6F383FC4EEE45849D3E2B867BAC8191" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_B87EEB17361D981311392B867BAC70E5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_B87EEB17361D981311392B867BAC70E5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_DC8C664F703288C1AEAE2B867BAC19F6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_2DD48F557DB8FE2A713D2B867BAC331C" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_DC8C664F703288C1AEAE2B867BAC19F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_8F79CE887BDD3D16B1BB2B867BACF799" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_3D7A1920E7CEDDAFE0572B867BACBDAF" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_8F79CE887BDD3D16B1BB2B867BACF799" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_8F79CE887BDD3D16B1BB2B867BACF799" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_8F79CE887BDD3D16B1BB2B867BACF799" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_193231307795893486C42B867BACFE9D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_193231307795893486C42B867BACFE9D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_BB4304083B4142CCD4C22B867BAC36F5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_BB4304083B4142CCD4C22B867BAC36F5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_72F3072791A1019FAA3F2B867BAC902C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_72F3072791A1019FAA3F2B867BAC902C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_1C835870C790AEED81652B867BAC7702" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_3EDE646EC4BE3A566C6D2B867BAC25DC" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_1C835870C790AEED81652B867BAC7702" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsNumberOfContracts2" xlink:label="loc_efsc_FinancingReceivableModificationsNumberOfContracts2_B3CCD749D702D7D933DC2B867BACC2B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_efsc_FinancingReceivableModificationsNumberOfContracts2_B3CCD749D702D7D933DC2B867BACC2B4" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsPremodificationRecordedInvestment2" xlink:label="loc_efsc_FinancingReceivableModificationsPremodificationRecordedInvestment2_6EBCC44CEA1E3E5B59172B867BAC8547" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_efsc_FinancingReceivableModificationsPremodificationRecordedInvestment2_6EBCC44CEA1E3E5B59172B867BAC8547" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:label="loc_efsc_FinancingReceivableModificationsPostModificationRecordedInvestment2_05E2C152B2565BF30C7E2B867BAC7511" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_efsc_FinancingReceivableModificationsPostModificationRecordedInvestment2_05E2C152B2565BF30C7E2B867BAC7511" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableModificationsReserve" xlink:label="loc_efsc_FinancingReceivableModificationsReserve_6D86B39AC840A6D8AFC62B867BAC8058" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_efsc_FinancingReceivableModificationsReserve_6D86B39AC840A6D8AFC62B867BAC8058" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" xlink:label="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_4AC08C25BF9EA6D149C72B867BAC2621" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_4AC08C25BF9EA6D149C72B867BAC2621" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_17CBFD8731E3067CCABD2B867BAC4253" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_3CE79F8796ACF54F71F22B867BACAD89" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_17CBFD8731E3067CCABD2B867BAC4253" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentByRiskCategoryOfNonCoveredLoansByPortfolioClassAndCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_885F0502CBC3D84C0FC62B867BDB6931" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_885F0502CBC3D84C0FC62B867BDB6931" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_4C87E273785B74D091412B867BDBDCD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:to="loc_efsc_LoansByMajorCategoryAxis_4C87E273785B74D091412B867BDBDCD2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_B111684DD61CFCB515D42B867BDB134F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_4C87E273785B74D091412B867BDBDCD2" xlink:to="loc_efsc_LoansByMajorCategoryDomain_B111684DD61CFCB515D42B867BDB134F_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_B111684DD61CFCB515D42B867BDB134F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_4C87E273785B74D091412B867BDBDCD2" xlink:to="loc_efsc_LoansByMajorCategoryDomain_B111684DD61CFCB515D42B867BDB134F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_F3C113FED91F98B9ED062B867BDB4CF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_B111684DD61CFCB515D42B867BDB134F" xlink:to="loc_efsc_NoncoveredLoansMember_F3C113FED91F98B9ED062B867BDB4CF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_180F8BDF33401207F8B22B867BDBA873" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_180F8BDF33401207F8B22B867BDBA873" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_180F8BDF33401207F8B22B867BDBA873" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_180F8BDF33401207F8B22B867BDBA873" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_03CD776B2F4073B31AB02B867BDB8C65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_03CD776B2F4073B31AB02B867BDB8C65" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_4D9319EBF01F92493A242B867BDBD7D2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_4D9319EBF01F92493A242B867BDBD7D2" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_0673223B1CC36A267C9B2B867BDBF5CB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_7A25F7843B17816F12512B867BDBD673" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_0673223B1CC36A267C9B2B867BDBF5CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_179967F8CEE9944283F82B867BDB5B48" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_179967F8CEE9944283F82B867BDB5B48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_179967F8CEE9944283F82B867BDB5B48" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_179967F8CEE9944283F82B867BDB5B48" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_09A155CE3EB6E940E66A2B867BDB5AA1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_09A155CE3EB6E940E66A2B867BDB5AA1" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_4B5BF8C525F4B1C6C46E2B867BDB708D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_4B5BF8C525F4B1C6C46E2B867BDB708D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_A176E84D6980C4FDD2712B867BDB7301" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_A176E84D6980C4FDD2712B867BDB7301" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_5E0DC885CF65E227806B2B867BDB0EB8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_4963A8657FDFA9B52FF62B867BDB95A4" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_5E0DC885CF65E227806B2B867BDB0EB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_42DBFA851B98E21776012B867BDB8C7E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_CB55EF10957DCD3229F72B867BDB9332" xlink:to="loc_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_42DBFA851B98E21776012B867BDB8C7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableByCreditQualityIndicatorDomain" xlink:label="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_42DBFA851B98E21776012B867BDB8C7E" xlink:to="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableByCreditQualityIndicatorDomain" xlink:label="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_42DBFA851B98E21776012B867BDB8C7E" xlink:to="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PassMember" xlink:label="loc_us-gaap_PassMember_38DC9588A5CFE7BAFE082B867BDBC20A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:to="loc_us-gaap_PassMember_38DC9588A5CFE7BAFE082B867BDBC20A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SpecialMentionMember" xlink:label="loc_us-gaap_SpecialMentionMember_7D1ACDD93C77126C04252B867BDBC3DC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:to="loc_us-gaap_SpecialMentionMember_7D1ACDD93C77126C04252B867BDBC3DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubstandardMember" xlink:label="loc_us-gaap_SubstandardMember_745D228C61275D9F073B2B867BDB1A60" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:to="loc_us-gaap_SubstandardMember_745D228C61275D9F073B2B867BDB1A60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DoubtfulMember" xlink:label="loc_us-gaap_DoubtfulMember_BBB6F605ED26634EA7842B867BDB0209" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableByCreditQualityIndicatorDomain_2D7C14A1A7B72C9E9CC82B867BDB8D97" xlink:to="loc_us-gaap_DoubtfulMember_BBB6F605ED26634EA7842B867BDB0209" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableCreditQualityTimePeriodExpectedToReturnToPerform" xlink:label="loc_efsc_FinancingReceivableCreditQualityTimePeriodExpectedToReturnToPerform_E82E91A9FA0510332DA82B867BDBA63D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_885F0502CBC3D84C0FC62B867BDB6931" xlink:to="loc_efsc_FinancingReceivableCreditQualityTimePeriodExpectedToReturnToPerform_E82E91A9FA0510332DA82B867BDBA63D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesReceivableGross" xlink:label="loc_us-gaap_NotesReceivableGross_F3BE2E79A39EBF9F63582B867BDBCAF8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_885F0502CBC3D84C0FC62B867BDB6931" xlink:to="loc_us-gaap_NotesReceivableGross_F3BE2E79A39EBF9F63582B867BDBCAF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_3EBC1D2C7EE481B184842B867BDBBC0A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_885F0502CBC3D84C0FC62B867BDB6931" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_3EBC1D2C7EE481B184842B867BDBBC0A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable" xlink:label="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsAxis" xlink:label="loc_efsc_NatureOfCommitmentsAxis_85F27B536444AC049DE32B867B3ECA3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:to="loc_efsc_NatureOfCommitmentsAxis_85F27B536444AC049DE32B867B3ECA3F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsDomain" xlink:label="loc_efsc_NatureOfCommitmentsDomain_5CB3C37C35C0B18E93232B867B3E5427_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_NatureOfCommitmentsAxis_85F27B536444AC049DE32B867B3ECA3F" xlink:to="loc_efsc_NatureOfCommitmentsDomain_5CB3C37C35C0B18E93232B867B3E5427_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NatureOfCommitmentsDomain" xlink:label="loc_efsc_NatureOfCommitmentsDomain_5CB3C37C35C0B18E93232B867B3E5427" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_NatureOfCommitmentsAxis_85F27B536444AC049DE32B867B3ECA3F" xlink:to="loc_efsc_NatureOfCommitmentsDomain_5CB3C37C35C0B18E93232B867B3E5427" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_UnadvancedCommitmentOnImpairedLoanMember" xlink:label="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_5889938A0D498E7661F92B867B3E64DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_NatureOfCommitmentsDomain_5CB3C37C35C0B18E93232B867B3E5427" xlink:to="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_5889938A0D498E7661F92B867B3E64DF" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_5F4F088D1D5C2DE80CF22B867B3EAAC1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:to="loc_efsc_LoansByMajorCategoryAxis_5F4F088D1D5C2DE80CF22B867B3EAAC1" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_3C9D837CD53B502707AB2B867B3EE57C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_5F4F088D1D5C2DE80CF22B867B3EAAC1" xlink:to="loc_efsc_LoansByMajorCategoryDomain_3C9D837CD53B502707AB2B867B3EE57C_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_3C9D837CD53B502707AB2B867B3EE57C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_5F4F088D1D5C2DE80CF22B867B3EAAC1" xlink:to="loc_efsc_LoansByMajorCategoryDomain_3C9D837CD53B502707AB2B867B3EE57C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_7A56AE079489A459BCA82B867B3EBF1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_3C9D837CD53B502707AB2B867B3EE57C" xlink:to="loc_efsc_NoncoveredLoansMember_7A56AE079489A459BCA82B867B3EBF1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_85DBAA8B03DD43F366232B867B3E1EA3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_85DBAA8B03DD43F366232B867B3E1EA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_85DBAA8B03DD43F366232B867B3E1EA3" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_85DBAA8B03DD43F366232B867B3E1EA3" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_C7F6DBE9A6DFF9B10B9D2B867B3E62DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_C7F6DBE9A6DFF9B10B9D2B867B3E62DF" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_9BCA14AB0A7EA8F671DC2B867B3E1709" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_9BCA14AB0A7EA8F671DC2B867B3E1709" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_6F66C11C3C05EB21607C2B867B3E1D8B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_6A36FF707BEE10BF6EBF2B867B3ED3BB" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_6F66C11C3C05EB21607C2B867B3E1D8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_EBF81FAE8C64DAEA649A2B867B3E05A1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_EBF81FAE8C64DAEA649A2B867B3E05A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_EBF81FAE8C64DAEA649A2B867B3E05A1" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_EBF81FAE8C64DAEA649A2B867B3E05A1" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_39747C4A5EF986126E692B867B3E000E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_39747C4A5EF986126E692B867B3E000E" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_40C48897310B549270FB2B867B3EC216" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_40C48897310B549270FB2B867B3EC216" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_AB99B87A31DD188C4B6A2B867B4E19A5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_AB99B87A31DD188C4B6A2B867B4E19A5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_99666086D230C0823C862B867B4E2A84" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7E63BECC0290F4A8DBD22B867B3E3A8D" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_99666086D230C0823C862B867B4E2A84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_ACE56691666DC7F0F5512B867B4E422F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInImpairedNonCoveredLoansByCategoryTable_6E596766CF73A53BD8482B867B3EF431" xlink:to="loc_us-gaap_FinancialInstrumentAxis_ACE56691666DC7F0F5512B867B4E422F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_F14CE27A3AF21DE7647E2B867B4E4625_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_ACE56691666DC7F0F5512B867B4E422F" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_F14CE27A3AF21DE7647E2B867B4E4625_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_F14CE27A3AF21DE7647E2B867B4E4625" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_ACE56691666DC7F0F5512B867B4E422F" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_F14CE27A3AF21DE7647E2B867B4E4625" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_UnadvancedCommitmentOnImpairedLoanMember" xlink:label="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_A49F6A47A7B0E423D5332B867B4E4BF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_F14CE27A3AF21DE7647E2B867B4E4625" xlink:to="loc_efsc_UnadvancedCommitmentOnImpairedLoanMember_A49F6A47A7B0E423D5332B867B4E4BF6" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans" xlink:label="loc_efsc_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_81CEC7D2B88D521C22BD2B867B4EF7FF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_efsc_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_81CEC7D2B88D521C22BD2B867B4EF7FF" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansContractualInterestIncludingInterestLostOnNonaccrualLoans" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansContractualInterestIncludingInterestLostOnNonaccrualLoans_A3C70DAD843032D072FE2B867B4E3F8E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansContractualInterestIncludingInterestLostOnNonaccrualLoans_A3C70DAD843032D072FE2B867B4E3F8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod" xlink:label="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod_73DB3F3E5ADE801D94C22B867B4E2401" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod_73DB3F3E5ADE801D94C22B867B4E2401" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod" xlink:label="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_962E1D2201A2812022592B867B4E3912" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_962E1D2201A2812022592B867B4E3912" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend_7448783E39EE76DE467B2B867B4E5213" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLend_7448783E39EE76DE467B2B867B4E5213" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" xlink:label="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_1E62D927586396B852122B867B4E0A93" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_1E62D927586396B852122B867B4E0A93" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve" xlink:label="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_159A2A5C6A3CF5B4FE762B867B4EE471" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_efsc_LoansAndLeasesReceivableImpairedLoansCommitmentToLendReserve_159A2A5C6A3CF5B4FE762B867B4EE471" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_69F357483FA1F6836F052B867B4EAC7B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_69F357483FA1F6836F052B867B4EAC7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:label="loc_us-gaap_FinancingReceivableModificationsRecordedInvestment_D3FB7BA1D443BAF6206E2B867B4E5205" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_FinancingReceivableModificationsRecordedInvestment_D3FB7BA1D443BAF6206E2B867B4E5205" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_5F5F7991325C2278A09C2B867B4E7205" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_5F5F7991325C2278A09C2B867B4E7205" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_0C2B079BA001133F5C8D2B867B4E3022" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_E715D2F0E76EC8716E182B867B4E6AD3" xlink:to="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_0C2B079BA001133F5C8D2B867B4E3022" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredSummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodDetails" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems" xlink:label="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_7DF2159B26EF0549C20A2B867BCBCEAC" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable" xlink:label="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_CB45B0859E3B0711E05F2B867BCB1CFF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_7DF2159B26EF0549C20A2B867BCBCEAC" xlink:to="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_CB45B0859E3B0711E05F2B867BCB1CFF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_7EE5B9082662E2F3FB952B867BCBDD1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_CB45B0859E3B0711E05F2B867BCB1CFF" xlink:to="loc_efsc_LoansByMajorCategoryAxis_7EE5B9082662E2F3FB952B867BCBDD1A" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_EE49C18581297229A4A02B867BCB058D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_7EE5B9082662E2F3FB952B867BCBDD1A" xlink:to="loc_efsc_LoansByMajorCategoryDomain_EE49C18581297229A4A02B867BCB058D_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_EE49C18581297229A4A02B867BCB058D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_7EE5B9082662E2F3FB952B867BCBDD1A" xlink:to="loc_efsc_LoansByMajorCategoryDomain_EE49C18581297229A4A02B867BCB058D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_3CA48F3D71EFA6529FF42B867BCBACFF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_EE49C18581297229A4A02B867BCB058D" xlink:to="loc_efsc_NoncoveredLoansMember_3CA48F3D71EFA6529FF42B867BCBACFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_52264A2E113986AEEE252B867BCBC62E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_CB45B0859E3B0711E05F2B867BCB1CFF" xlink:to="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_52264A2E113986AEEE252B867BCBC62E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_52264A2E113986AEEE252B867BCBC62E" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceDomain" xlink:label="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableInformationByPortfolioSegmentAxis_52264A2E113986AEEE252B867BCBC62E" xlink:to="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialAndIndustrialPortfolioSegmentMember" xlink:label="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_B488B7F814E777A39B002B867BCB9398" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:to="loc_efsc_CommercialAndIndustrialPortfolioSegmentMember_B488B7F814E777A39B002B867BCB9398" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_RealEstateLoansPortfolioSegmentMember" xlink:label="loc_efsc_RealEstateLoansPortfolioSegmentMember_042AE72005C5468EAA672B867BCBE518" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:to="loc_efsc_RealEstateLoansPortfolioSegmentMember_042AE72005C5468EAA672B867BCBE518" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConsumerAndOtherPortfolioSegmentMember" xlink:label="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_C438188567349A5FD1002B867BCB594F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:to="loc_efsc_ConsumerAndOtherPortfolioSegmentMember_C438188567349A5FD1002B867BCB594F" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_QualitativeAdjustmentPortfolioSegmentMember" xlink:label="loc_efsc_QualitativeAdjustmentPortfolioSegmentMember_2993CE3EFFEFFEE332A12B867BCB37A4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceDomain_35EEADAE233620C772A42B867BCB6153" xlink:to="loc_efsc_QualitativeAdjustmentPortfolioSegmentMember_2993CE3EFFEFFEE332A12B867BCB37A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_B1590830097174BC36DE2B867BCB559F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodTable_CB45B0859E3B0711E05F2B867BCB1CFF" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_B1590830097174BC36DE2B867BCB559F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_B1590830097174BC36DE2B867BCB559F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_B1590830097174BC36DE2B867BCB559F" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_87BF707560F2BC367E132B867BCB4A48" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:to="loc_efsc_CommercialRealEstateOwnerOccupiedFinancingReceivableMember_87BF707560F2BC367E132B867BCB4A48" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember" xlink:label="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2CC1B6CC4F6930781CC52B867BCBB8DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:to="loc_efsc_CommercialRealEstateInvestorOwnedFinancingReceivableMember_2CC1B6CC4F6930781CC52B867BCBB8DE" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ConstructionAndLandDevelopmentFinancingReceivableMember" xlink:label="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_3F187B8C7B7142D30DBD2B867BCB0AD5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:to="loc_efsc_ConstructionAndLandDevelopmentFinancingReceivableMember_3F187B8C7B7142D30DBD2B867BCB0AD5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ResidentialRealEstateFinancingReceivableMember" xlink:label="loc_efsc_ResidentialRealEstateFinancingReceivableMember_7FF039374C0E384465772B867BCB4200" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_B135311F2D9F5ABCF4322B867BCB35BC" xlink:to="loc_efsc_ResidentialRealEstateFinancingReceivableMember_7FF039374C0E384465772B867BCB4200" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowanceAbstract" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowanceAbstract_024D5EB90D130215010D2B867BCBEC06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_7DF2159B26EF0549C20A2B867BCBCEAC" xlink:to="loc_us-gaap_LoansAndLeasesReceivableAllowanceAbstract_024D5EB90D130215010D2B867BCBEC06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_818A64F5619D36C444512B867BCB638D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowanceAbstract_024D5EB90D130215010D2B867BCBEC06" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_818A64F5619D36C444512B867BCB638D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_B6C91158297B5FB87B5E2B867BCB1D54" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowanceAbstract_024D5EB90D130215010D2B867BCBEC06" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_B6C91158297B5FB87B5E2B867BCB1D54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_D3A4F66DCDF91A704A2F2B867BCBF98B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowanceAbstract_024D5EB90D130215010D2B867BCBEC06" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_D3A4F66DCDF91A704A2F2B867BCBF98B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_SummaryOfRecordedInvestmentInNonCoveredLoansByPortfolioClassAndCategoryBasedOnImpairmentMethodLineItems_7DF2159B26EF0549C20A2B867BCBCEAC" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_A37162E84A50F955EC7E2B867BCBAF92" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:to="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_A37162E84A50F955EC7E2B867BCBAF92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_7ACC224AA71401B9FB842B867BCB282F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:to="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_7ACC224AA71401B9FB842B867BCB282F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesReceivableGross" xlink:label="loc_us-gaap_NotesReceivableGross_581B15B24AF54388694F2B867BCB33BA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:to="loc_us-gaap_NotesReceivableGross_581B15B24AF54388694F2B867BCB33BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_10A69089926C762BACF32B867BCB81A9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmountAbstract_030AFC7E8D83AFEDE1EA2B867BCBCFD7" xlink:to="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_10A69089926C762BACF32B867BCB81A9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/PortfolioLoansNotCoveredByLossShareNonCoveredTables" xlink:type="extended">
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansLineItems" xlink:label="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:type="locator" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_CoveredLoansTable" xlink:label="loc_efsc_CoveredLoansTable_AE4A312EC747EB2151E42B867BDB22CE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_efsc_CoveredLoansTable_AE4A312EC747EB2151E42B867BDB22CE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryAxis" xlink:label="loc_efsc_LoansByMajorCategoryAxis_0C91E092D0883FD225152B867BDBEDF3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_efsc_CoveredLoansTable_AE4A312EC747EB2151E42B867BDB22CE" xlink:to="loc_efsc_LoansByMajorCategoryAxis_0C91E092D0883FD225152B867BDBEDF3" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_0F3E95C0FCBBF55EDED72B867BDBBCE5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_efsc_LoansByMajorCategoryAxis_0C91E092D0883FD225152B867BDBEDF3" xlink:to="loc_efsc_LoansByMajorCategoryDomain_0F3E95C0FCBBF55EDED72B867BDBBCE5_default" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansByMajorCategoryDomain" xlink:label="loc_efsc_LoansByMajorCategoryDomain_0F3E95C0FCBBF55EDED72B867BDBBCE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_efsc_LoansByMajorCategoryAxis_0C91E092D0883FD225152B867BDBEDF3" xlink:to="loc_efsc_LoansByMajorCategoryDomain_0F3E95C0FCBBF55EDED72B867BDBBCE5" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_NoncoveredLoansMember" xlink:label="loc_efsc_NoncoveredLoansMember_216F9C22B2BF695CE3492B867BDB708C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_LoansByMajorCategoryDomain_0F3E95C0FCBBF55EDED72B867BDBBCE5" xlink:to="loc_efsc_NoncoveredLoansMember_216F9C22B2BF695CE3492B867BDB708C" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ScheduleOfAccountsNotesLoansAndFinancingReceivableExcludingAllowanceForCreditLossesTableTextBlock" xlink:label="loc_efsc_ScheduleOfAccountsNotesLoansAndFinancingReceivableExcludingAllowanceForCreditLossesTableTextBlock_060C9C30B7597397C7142B867BEB57A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_efsc_ScheduleOfAccountsNotesLoansAndFinancingReceivableExcludingAllowanceForCreditLossesTableTextBlock_060C9C30B7597397C7142B867BEB57A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfCreditLossesRelatedToFinancingReceivablesCurrentAndNoncurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCreditLossesRelatedToFinancingReceivablesCurrentAndNoncurrentTableTextBlock_4B9C21C8D77AA4733A0F2B867BEB5A3C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_us-gaap_ScheduleOfCreditLossesRelatedToFinancingReceivablesCurrentAndNoncurrentTableTextBlock_4B9C21C8D77AA4733A0F2B867BEB5A3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairedFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_ImpairedFinancingReceivablesTableTextBlock_CB2D0637C6E099F953AA2B867BEB9D00" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_us-gaap_ImpairedFinancingReceivablesTableTextBlock_CB2D0637C6E099F953AA2B867BEB9D00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_AFD59DA344958F1E6F602B867BEBA55B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_AFD59DA344958F1E6F602B867BEBA55B" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_ScheduleOfFinancingReceivableTroubledDebtRestructuringsSubsequentDefaultsTableTextBlock" xlink:label="loc_efsc_ScheduleOfFinancingReceivableTroubledDebtRestructuringsSubsequentDefaultsTableTextBlock_7E4342B7D57C4D26D9BD2B867BEBAF85" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_efsc_ScheduleOfFinancingReceivableTroubledDebtRestructuringsSubsequentDefaultsTableTextBlock_7E4342B7D57C4D26D9BD2B867BEBAF85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_499F13A2D3A6C2F4D8482B867BEB3A42" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_499F13A2D3A6C2F4D8482B867BEB3A42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" xlink:label="loc_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_FD16F181667B2BC626F42B867BEB84E9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_efsc_CoveredLoansLineItems_1A434C6DAD841916A58D2B867BEB7000" xlink:to="loc_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_FD16F181667B2BC626F42B867BEB84E9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.enterprisebank.com/role/SegmentReportingDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01005AAECF5D3F4D78862B867B2FEEB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01005AAECF5D3F4D78862B867B2FEEB8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_05CD14BDC7BBA6E0EF5F2B867B2FCAE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01005AAECF5D3F4D78862B867B2FEEB8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_05CD14BDC7BBA6E0EF5F2B867B2FCAE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_05CD14BDC7BBA6E0EF5F2B867B2FCAE4" xlink:to="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_05CD14BDC7BBA6E0EF5F2B867B2FCAE4" xlink:to="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_BankingSegmentMember" xlink:label="loc_efsc_BankingSegmentMember_8983A1A5F52FEB17A6872B867B2FEB8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338" xlink:to="loc_efsc_BankingSegmentMember_8983A1A5F52FEB17A6872B867B2FEB8D" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_WealthManagementMember" xlink:label="loc_efsc_WealthManagementMember_DEEFF99261766A02EC252B867B2F0A76" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338" xlink:to="loc_efsc_WealthManagementMember_DEEFF99261766A02EC252B867B2F0A76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CorporateMember" xlink:label="loc_us-gaap_CorporateMember_D994321A4FDCF15908102B867B2FF233" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_57E8F787AD3AEDBF84C72B867B2FE338" xlink:to="loc_us-gaap_CorporateMember_D994321A4FDCF15908102B867B2FF233" xlink:type="arc" />
    <link:loc xlink:href="efsc-20120930.xsd#efsc_LoansAndLeasesReceivableGrossCarryingAmountCoveredAndNotCovered" xlink:label="loc_efsc_LoansAndLeasesReceivableGrossCarryingAmountCoveredAndNotCovered_4CA9FDD09EA681FE821D2B867B2F09CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_efsc_LoansAndLeasesReceivableGrossCarryingAmountCoveredAndNotCovered_4CA9FDD09EA681FE821D2B867B2F09CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_547829AC66C40A591FCB2B867B2F3BE8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_Goodwill_547829AC66C40A591FCB2B867B2F3BE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_55C93AB5B3C008E3C8652B867B2FAAEB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_55C93AB5B3C008E3C8652B867B2FAAEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Deposits" xlink:label="loc_us-gaap_Deposits_65A38DEBCB52284B65A72B867B2FA4ED" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_Deposits_65A38DEBCB52284B65A72B867B2FA4ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_EAC02A48A945DC8BD5BF2B867B2FB2E6" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_EAC02A48A945DC8BD5BF2B867B2FB2E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_682E89DC1CF58C9F4B962B867B2FE01D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_Assets_682E89DC1CF58C9F4B962B867B2FE01D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingInformationProfitLossAbstract" xlink:label="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A39CFC5DBCF1DB776D3E2B867B2F7058" xlink:to="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_CEDF492DFDC6953FC9DF2B867B2F5B16" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_CEDF492DFDC6953FC9DF2B867B2F5B16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProvisionForLoanAndLeaseLosses" xlink:label="loc_us-gaap_ProvisionForLoanAndLeaseLosses_59B189F803D5D4CF02982B867B2FD0DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:to="loc_us-gaap_ProvisionForLoanAndLeaseLosses_59B189F803D5D4CF02982B867B2FD0DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_78445AF0D3600A5958A82B867B2FFB57" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:to="loc_us-gaap_NoninterestIncome_78445AF0D3600A5958A82B867B2FFB57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_568FDF83C2F0312D7CD02B867B2F5C2D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:to="loc_us-gaap_NoninterestExpense_568FDF83C2F0312D7CD02B867B2F5C2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_199FCA74C943E4C0E0CF2B867B2F3A2F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_AFB5B67DD203B55C61ED2B867B2F7E97" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_199FCA74C943E4C0E0CF2B867B2F3A2F" xlink:type="arc" />
  </link:definitionLink>
</link:linkbase>
