<?xml version="1.0" encoding="UTF-8"?>
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/1/GB" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#GB"/>
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/2/GK" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#GK"/>
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/3/GP" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#GP"/>
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/4/GR" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#GR"/>
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/5/GC" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#GC"/>
  <link:roleRef roleURI="http://www.esma.europa.eu/xbrl/role/cor/esef_role-999999" xlink:type="simple" xlink:href="http://www.esma.europa.eu/taxonomy/2021-03-24/esef_cor.xsd#esef_role-999999"/>
  <link:roleRef roleURI="http://www.mbank.pl/xbrl/2022/Role/6/Anchoring" xlink:type="simple" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#Anchoring"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower"/>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.mbank.pl/xbrl/2022/Role/2/GK">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_StatementOfChangesInEquityAbstract" xlink:label="StatementOfChangesInEquityAbstract"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="IssueOfEquity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IssueOfEquity"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_StatementOfChangesInEquityAbstractTable001" xlink:label="StatementOfChangesInEquityAbstractTable001"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="StatementOfChangesInEquityAbstractTable001" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementOfChangesInEquityAbstractTable001" xlink:to="ComponentsOfEquityAxis" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityMember" xlink:label="EquityMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ComponentsOfEquityAxis" xlink:to="EquityMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="EquityAttributableToOwnersOfParentMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="EquityAttributableToOwnersOfParentMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="NoncontrollingInterestsMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="NoncontrollingInterestsMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:label="IncreaseDecreaseThroughTransfersAndOtherChangesEquity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IncreaseDecreaseThroughTransfersAndOtherChangesEquity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssuedCapitalMember" xlink:label="IssuedCapitalMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="IssuedCapitalMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SharePremiumMember" xlink:label="SharePremiumMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="SharePremiumMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriodMember" xlink:label="RetainedEarningsExcludingProfitLossForReportingPeriodMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="RetainedEarningsExcludingProfitLossForReportingPeriodMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsProfitLossForReportingPeriodMember" xlink:label="RetainedEarningsProfitLossForReportingPeriodMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="RetainedEarningsProfitLossForReportingPeriodMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember" xlink:to="AccumulatedOtherComprehensiveIncomeMember" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees" xlink:label="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsSettlementOfExercisedOptions" xlink:label="SharebasedPaymentTransactionsSettlementOfExercisedOptions"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="SharebasedPaymentTransactionsSettlementOfExercisedOptions"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Equity" xlink:label="Equity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="Equity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:label="IncreaseDecreaseThroughAppropriationOfRetainedEarnings"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IncreaseDecreaseThroughAppropriationOfRetainedEarnings"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="ComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Equity" xlink:label="Equity_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="Equity_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_StatementOfChangesInEquityAbstractTable001" xlink:label="StatementOfChangesInEquityAbstractTable001_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="StatementOfChangesInEquityAbstractTable001_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ComponentsOfEquityAxis_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="StatementOfChangesInEquityAbstractTable001_2" xlink:to="ComponentsOfEquityAxis_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityMember" xlink:label="EquityMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ComponentsOfEquityAxis_2" xlink:to="EquityMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssuedCapitalMember" xlink:label="IssuedCapitalMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="IssuedCapitalMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SharePremiumMember" xlink:label="SharePremiumMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="SharePremiumMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriodMember" xlink:label="RetainedEarningsExcludingProfitLossForReportingPeriodMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="RetainedEarningsExcludingProfitLossForReportingPeriodMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsProfitLossForReportingPeriodMember" xlink:label="RetainedEarningsProfitLossForReportingPeriodMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="RetainedEarningsProfitLossForReportingPeriodMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="AccumulatedOtherComprehensiveIncomeMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="AccumulatedOtherComprehensiveIncomeMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="EquityAttributableToOwnersOfParentMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="EquityAttributableToOwnersOfParentMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="NoncontrollingInterestsMember_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EquityMember_2" xlink:to="NoncontrollingInterestsMember_2" xbrldt:contextElement="scenario" xbrldt:closed="true"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:label="IncreaseDecreaseThroughAppropriationOfRetainedEarnings_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IncreaseDecreaseThroughAppropriationOfRetainedEarnings_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ComprehensiveIncome_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="ComprehensiveIncome_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="IssueOfEquity_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IssueOfEquity_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="IncreaseDecreaseThroughSharebasedPaymentTransactions_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="IncreaseDecreaseThroughSharebasedPaymentTransactions_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees" xlink:label="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsSettlementOfExercisedOptions" xlink:label="SharebasedPaymentTransactionsSettlementOfExercisedOptions_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="StatementOfChangesInEquityAbstract" xlink:to="SharebasedPaymentTransactionsSettlementOfExercisedOptions_2"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.esma.europa.eu/xbrl/role/cor/esef_role-999999">
    <link:loc xlink:type="locator" xlink:href="http://www.esma.europa.eu/taxonomy/2021-03-24/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:label="LineItemsNotDimensionallyQualifiedPlaceholder"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfGoingConcernExplanatory" xlink:label="DisclosureOfGoingConcernExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfGoingConcernExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory" xlink:label="DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_BasicEarningsLossPerShare" xlink:label="BasicEarningsLossPerShare"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="BasicEarningsLossPerShare"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory" xlink:label="DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDeferredIncomeExplanatory" xlink:label="DisclosureOfDeferredIncomeExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDeferredIncomeExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:label="DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:label="DisclosureOfOtherOperatingIncomeExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfOtherOperatingIncomeExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:label="InterestReceivedClassifiedAsOperatingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestReceivedClassifiedAsOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="CashFlowsFromUsedInFinancingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashFlowsFromUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NoncontrollingInterests" xlink:label="NoncontrollingInterests"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NoncontrollingInterests"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:label="DisclosureOfFairValueMeasurementExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFairValueMeasurementExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:label="DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfLeasesExplanatory" xlink:label="DisclosureOfLeasesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfLeasesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory" xlink:label="DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestExpense" xlink:label="InterestExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:label="DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="DeferredTaxLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:label="DescriptionOfAccountingPolicyForEarningsPerShareExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForEarningsPerShareExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" xlink:label="DisclosureOfAuthorisationOfFinancialStatementsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfAuthorisationOfFinancialStatementsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:label="DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AmountsDueToCustomersMeasuredAtAmortisedCost" xlink:label="AmountsDueToCustomersMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AmountsDueToCustomersMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsProfitLossForReportingPeriod" xlink:label="RetainedEarningsProfitLossForReportingPeriod"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RetainedEarningsProfitLossForReportingPeriod"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss" xlink:label="GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfAssetsAndLiabilitiesWithSignificantRiskOfMaterialAdjustmentExplanatory" xlink:label="DisclosureOfAssetsAndLiabilitiesWithSignificantRiskOfMaterialAdjustmentExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfAssetsAndLiabilitiesWithSignificantRiskOfMaterialAdjustmentExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale" xlink:label="NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdministrativeExpense" xlink:label="AdministrativeExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdministrativeExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:label="DisclosureOfBasisOfConsolidationExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfBasisOfConsolidationExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:label="DisclosureOfGeneralAndAdministrativeExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfGeneralAndAdministrativeExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:label="DisclosureOfAccountingJudgementsAndEstimatesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfAccountingJudgementsAndEstimatesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory" xlink:label="DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFeeAndCommissionIncomeAndExpenseExplanatory" xlink:label="DescriptionOfAccountingPolicyForFeeAndCommissionIncomeAndExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFeeAndCommissionIncomeAndExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="EquityAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="EquityAttributableToOwnersOfParent"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriod" xlink:label="RetainedEarningsExcludingProfitLossForReportingPeriod"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RetainedEarningsExcludingProfitLossForReportingPeriod"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_NetTradingIncomeExpense" xlink:label="NetTradingIncomeExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NetTradingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Liabilities" xlink:label="Liabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Liabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DeferredTaxAssets" xlink:label="DeferredTaxAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DeferredTaxAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfTradingIncomeExpenseExplanatory" xlink:label="DisclosureOfTradingIncomeExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfTradingIncomeExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory" xlink:label="DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FeeAndCommissionExpense" xlink:label="FeeAndCommissionExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FeeAndCommissionExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:label="DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SubordinatedLiabilities" xlink:label="SubordinatedLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="SubordinatedLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss" xlink:label="GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:label="DisclosureOfContingentLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfContingentLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains" xlink:label="AdjustmentsForUnrealisedForeignExchangeLossesGains"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForUnrealisedForeignExchangeLossesGains"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" xlink:label="ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_FinancialAssetsHeldForTradingAndHedgingDerivatives" xlink:label="FinancialAssetsHeldForTradingAndHedgingDerivatives"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialAssetsHeldForTradingAndHedgingDerivatives"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:label="InterestPaidClassifiedAsFinancingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestPaidClassifiedAsFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForInterestExpense" xlink:label="AdjustmentsForInterestExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForInterestExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InvestmentProperty" xlink:label="InvestmentProperty"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InvestmentProperty"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue" xlink:label="LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:label="DisclosureOfTradeAndOtherReceivablesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfTradeAndOtherReceivablesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_LeaseLiabilities" xlink:label="LeaseLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LeaseLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:label="DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssuedCapital" xlink:label="IssuedCapital"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IssuedCapital"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:label="DisclosureOfChangesInAccountingPoliciesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfChangesInAccountingPoliciesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherLiabilities" xlink:label="OtherLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:label="AdjustmentsForDepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForDepreciationAndAmortisationExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfReclassificationsOrChangesInPresentationExplanatory" xlink:label="DisclosureOfReclassificationsOrChangesInPresentationExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfReclassificationsOrChangesInPresentationExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForReclassificationOfFinancialInstrumentsExplanatory" xlink:label="DescriptionOfAccountingPolicyForReclassificationOfFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForReclassificationOfFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForTreasurySharesExplanatory" xlink:label="DescriptionOfAccountingPolicyForTreasurySharesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForTreasurySharesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Provisions" xlink:label="Provisions"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Provisions"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" xlink:label="DisclosureOfPrepaymentsAndOtherAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfPrepaymentsAndOtherAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:label="DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCashAndBankBalancesAtCentralBanksExplanatory" xlink:label="DisclosureOfCashAndBankBalancesAtCentralBanksExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCashAndBankBalancesAtCentralBanksExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RevenueFromDividends" xlink:label="RevenueFromDividends"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RevenueFromDividends"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInvestmentPropertyExplanatory" xlink:label="DisclosureOfInvestmentPropertyExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInvestmentPropertyExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FeeAndCommissionIncomeExpense" xlink:label="FeeAndCommissionIncomeExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FeeAndCommissionIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:label="DisclosureOfEarningsPerShareExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfEarningsPerShareExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:label="DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:label="NameOfReportingEntityOrOtherMeansOfIdentification"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NameOfReportingEntityOrOtherMeansOfIdentification"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AmountsDueToBanksMeasuredAtAmortisedCost" xlink:label="AmountsDueToBanksMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AmountsDueToBanksMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:label="DisclosureOfBorrowingCostsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfBorrowingCostsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SharePremium" xlink:label="SharePremium"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="SharePremium"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:label="DescriptionOfAccountingPolicyForIncomeTaxExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForIncomeTaxExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:label="DisclosureOfEventsAfterReportingPeriodExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfEventsAfterReportingPeriodExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfGoodwillExplanatory" xlink:label="DisclosureOfGoodwillExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfGoodwillExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue" xlink:label="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDividendIncome" xlink:label="AdjustmentsForDividendIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForDividendIncome"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_LoansAndAdvancesToCustomersMeasuredAtAmortisedCost" xlink:label="LoansAndAdvancesToCustomersMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LoansAndAdvancesToCustomersMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:label="DisclosureOfMarketRiskExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfMarketRiskExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:label="DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:label="DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:label="DisclosureOfRelatedPartyExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfRelatedPartyExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" xlink:label="AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:label="DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory" xlink:label="DisclosureOfDerivativeFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDerivativeFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:label="ComprehensiveIncomeAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ComprehensiveIncomeAttributableToNoncontrollingInterests"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare" xlink:label="DilutedEarningsLossPerShare"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DilutedEarningsLossPerShare"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NameOfUltimateParentOfGroup" xlink:label="NameOfUltimateParentOfGroup"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NameOfUltimateParentOfGroup"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:label="ProfitLossAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProfitLossAttributableToNoncontrollingInterests"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="CashFlowsFromUsedInOperatingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashFlowsFromUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_TaxExpenseOtherThanIncomeTaxExpense" xlink:label="TaxExpenseOtherThanIncomeTaxExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="TaxExpenseOtherThanIncomeTaxExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:label="DisclosureOfFinancialRiskManagementExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialRiskManagementExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:label="OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="IntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IntangibleAssetsAndGoodwill"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory" xlink:label="DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory" xlink:label="DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentTaxLiabilities" xlink:label="CurrentTaxLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CurrentTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesHeldForTradingExplanatory" xlink:label="DisclosureOfFinancialLiabilitiesHeldForTradingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialLiabilitiesHeldForTradingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FeeAndCommissionIncome" xlink:label="FeeAndCommissionIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FeeAndCommissionIncome"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_PropertyPlantAndEquipmentAndRightOfUse" xlink:label="PropertyPlantAndEquipmentAndRightOfUse"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="PropertyPlantAndEquipmentAndRightOfUse"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory" xlink:label="DisclosureOfNotesAndOtherExplanatoryInformationExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfNotesAndOtherExplanatoryInformationExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CurrentTaxAssets" xlink:label="CurrentTaxAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CurrentTaxAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfProvisionsExplanatory" xlink:label="DisclosureOfProvisionsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfProvisionsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:label="DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForCollateralExplanatory" xlink:label="DescriptionOfAccountingPolicyForCollateralExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForCollateralExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:label="DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:label="DisclosureOfIntangibleAssetsAndGoodwillExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfIntangibleAssetsAndGoodwillExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:label="DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForInterestIncome" xlink:label="AdjustmentsForInterestIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForInterestIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:label="CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:label="DescriptionOfAccountingPolicyForMeasuringInventories"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForMeasuringInventories"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfSubordinatedLiabilitiesExplanatory" xlink:label="DisclosureOfSubordinatedLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfSubordinatedLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="IncomeTaxesPaidRefundClassifiedAsOperatingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IncomeTaxesPaidRefundClassifiedAsOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:label="IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesOnInvestingActivities" xlink:label="GainsLossesOnInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="GainsLossesOnInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:label="DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ProfitLossFromOperatingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProfitLossFromOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtAmortisedCost" xlink:label="FinancialAssetsAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialAssetsAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInValueOfForeignCurrencyBasisSpreads" xlink:label="OtherComprehensiveIncomeNetOfTaxChangeInValueOfForeignCurrencyBasisSpreads"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeNetOfTaxChangeInValueOfForeignCurrencyBasisSpreads"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:label="DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForGoodwillExplanatory" xlink:label="DescriptionOfAccountingPolicyForGoodwillExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForGoodwillExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:label="DisclosureOfInformationAboutEmployeesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInformationAboutEmployeesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="InterestPaidClassifiedAsOperatingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestPaidClassifiedAsOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:label="DisclosureOfFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProceedsFromIssueOfOrdinaryShares" xlink:label="ProceedsFromIssueOfOrdinaryShares"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProceedsFromIssueOfOrdinaryShares"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory" xlink:label="DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:label="DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:label="DisclosureOfTradeAndOtherPayablesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfTradeAndOtherPayablesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsDesignatedAtFairValueThroughProfitOrLossExplanatory" xlink:label="DisclosureOfFinancialInstrumentsDesignatedAtFairValueThroughProfitOrLossExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialInstrumentsDesignatedAtFairValueThroughProfitOrLossExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:label="DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_DebtSecuritiesMeasuredAtAmortisedCost" xlink:label="DebtSecuritiesMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DebtSecuritiesMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:label="DescriptionOfAccountingPolicyForFinancialAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFinancialAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" xlink:label="DisclosureOfAllowanceForCreditLossesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfAllowanceForCreditLossesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" xlink:label="DividendsReceivedClassifiedAsInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DividendsReceivedClassifiedAsInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:label="DisclosureOfIssuedCapitalExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfIssuedCapitalExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_EquityInstrumentsMandatorilyMeasuredAtFairValue" xlink:label="EquityInstrumentsMandatorilyMeasuredAtFairValue"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="EquityInstrumentsMandatorilyMeasuredAtFairValue"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives" xlink:label="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ComprehensiveIncome_3"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ComprehensiveIncome_3"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ProceedsFromIssueOfBondsNotesAndDebentures"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProceedsFromIssueOfBondsNotesAndDebentures"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax" xlink:label="GainsLossesOnExchangeDifferencesOnTranslationNetOfTax"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="GainsLossesOnExchangeDifferencesOnTranslationNetOfTax"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDebtSecuritiesExplanatory" xlink:label="DisclosureOfDebtSecuritiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDebtSecuritiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_StatementOfIFRSCompliance" xlink:label="StatementOfIFRSCompliance"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="StatementOfIFRSCompliance"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDepositsFromCustomersExplanatory" xlink:label="DisclosureOfDepositsFromCustomersExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDepositsFromCustomersExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:label="DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashAndBankBalancesAtCentralBanks" xlink:label="CashAndBankBalancesAtCentralBanks"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashAndBankBalancesAtCentralBanks"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory" xlink:label="DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks" xlink:label="AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:label="DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities" xlink:label="OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCost" xlink:label="FinancialLiabilitiesAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialLiabilitiesAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome" xlink:label="ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_DebtSecuritiesMandatorilyMeasuredAtFairValue" xlink:label="DebtSecuritiesMandatorilyMeasuredAtFairValue"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DebtSecuritiesMandatorilyMeasuredAtFairValue"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:label="OtherComprehensiveIncomeNetOfTaxCashFlowHedges"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeNetOfTaxCashFlowHedges"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_RepaymentsOfLoansAndAdvancesFromBanks" xlink:label="RepaymentsOfLoansAndAdvancesFromBanks"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RepaymentsOfLoansAndAdvancesFromBanks"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialAssetsHeldForTradingExplanatory" xlink:label="DisclosureOfFinancialAssetsHeldForTradingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialAssetsHeldForTradingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory" xlink:label="DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ComprehensiveIncomeAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ComprehensiveIncomeAttributableToOwnersOfParent"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:label="DisclosureOfDepreciationAndAmortisationExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDepreciationAndAmortisationExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PrincipalPlaceOfBusiness" xlink:label="PrincipalPlaceOfBusiness"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="PrincipalPlaceOfBusiness"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ExplanationOfAssumptionAboutFutureWithSignificantRiskOfResultingInMaterialAdjustments" xlink:label="ExplanationOfAssumptionAboutFutureWithSignificantRiskOfResultingInMaterialAdjustments"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ExplanationOfAssumptionAboutFutureWithSignificantRiskOfResultingInMaterialAdjustments"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:label="LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:label="DisclosureOfOtherAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfOtherAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:label="DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DomicileOfEntity" xlink:label="DomicileOfEntity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DomicileOfEntity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ProfitLossBeforeTax"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProfitLossBeforeTax"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory" xlink:label="DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInIssuedDebtSecurities" xlink:label="ChangesInIssuedDebtSecurities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ChangesInIssuedDebtSecurities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:label="DisclosureOfCommitmentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCommitmentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:label="DisclosureOfCreditRiskExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCreditRiskExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:label="DisclosureOfDeferredTaxesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDeferredTaxesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EquityAndLiabilities" xlink:label="EquityAndLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="EquityAndLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfLoansAndAdvancesToBanksExplanatory" xlink:label="DisclosureOfLoansAndAdvancesToBanksExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfLoansAndAdvancesToBanksExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" xlink:label="DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:label="DisclosureOfOtherOperatingExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfOtherOperatingExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsHeldForTradingExplanatory" xlink:label="DisclosureOfFinancialInstrumentsHeldForTradingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFinancialInstrumentsHeldForTradingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:label="DisclosureOfCashAndCashEquivalentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCashAndCashEquivalentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestRevenueExpense" xlink:label="InterestRevenueExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestRevenueExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:label="DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss" xlink:label="ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:label="DisclosureOfInformationAboutKeyManagementPersonnelExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInformationAboutKeyManagementPersonnelExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NameOfParentEntity" xlink:label="NameOfParentEntity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="NameOfParentEntity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfOtherAccountingPoliciesRelevantToUnderstandingOfFinancialStatements" xlink:label="DescriptionOfOtherAccountingPoliciesRelevantToUnderstandingOfFinancialStatements"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfOtherAccountingPoliciesRelevantToUnderstandingOfFinancialStatements"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties" xlink:label="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:label="RepaymentsOfBondsNotesAndDebentures"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RepaymentsOfBondsNotesAndDebentures"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" xlink:label="AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDividendsExplanatory" xlink:label="DisclosureOfDividendsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDividendsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfRepurchaseAndReverseRepurchaseAgreementsExplanatory" xlink:label="DisclosureOfRepurchaseAndReverseRepurchaseAgreementsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfRepurchaseAndReverseRepurchaseAgreementsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DebtSecurities" xlink:label="DebtSecurities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DebtSecurities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers" xlink:label="AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:label="DisclosureOfSharebasedPaymentArrangementsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfSharebasedPaymentArrangementsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:label="AdjustmentsForReconcileProfitLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForReconcileProfitLoss"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory" xlink:label="DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherAssets" xlink:label="OtherAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:label="DisclosureOfPropertyPlantAndEquipmentExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfPropertyPlantAndEquipmentExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:label="DisclosureOfImpairmentOfAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfImpairmentOfAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:label="DisclosureOfIntangibleAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfIntangibleAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:label="DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:label="DescriptionOfAccountingPolicyForProvisionsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForProvisionsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_LegalFormOfEntity" xlink:label="LegalFormOfEntity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LegalFormOfEntity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:label="AddressOfRegisteredOfficeOfEntity"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AddressOfRegisteredOfficeOfEntity"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCollateralExplanatory" xlink:label="DisclosureOfCollateralExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCollateralExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="IncomeTaxExpenseContinuingOperations"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IncomeTaxExpenseContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" xlink:label="DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:label="DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ShareCapital" xlink:label="ShareCapital"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ShareCapital"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:label="DisclosureOfBorrowingsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfBorrowingsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ExplanationOfChangeInNameOfReportingEntityOrOtherMeansOfIdentificationFromEndOfPrecedingReportingPeriod" xlink:label="ExplanationOfChangeInNameOfReportingEntityOrOtherMeansOfIdentificationFromEndOfPrecedingReportingPeriod"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ExplanationOfChangeInNameOfReportingEntityOrOtherMeansOfIdentificationFromEndOfPrecedingReportingPeriod"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherExpenseByNature" xlink:label="OtherExpenseByNature"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherExpenseByNature"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:label="DisclosureOfFairValueOfFinancialInstrumentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFairValueOfFinancialInstrumentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:label="DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="CashFlowsFromUsedInInvestingActivities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashFlowsFromUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" xlink:label="DescriptionOfAccountingPolicyForSubsidiariesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForSubsidiariesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:label="EffectOfExchangeRateChangesOnCashAndCashEquivalents"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="EffectOfExchangeRateChangesOnCashAndCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForHedgingExplanatory" xlink:label="DescriptionOfAccountingPolicyForHedgingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForHedgingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:label="DisclosureOfLiquidityRiskExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfLiquidityRiskExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="OtherComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:label="DisclosureOfEmployeeBenefitsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfEmployeeBenefitsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInSecuritiesAtAmortisedCost" xlink:label="ChangesInSecuritiesAtAmortisedCost"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ChangesInSecuritiesAtAmortisedCost"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="ProfitLossAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProfitLossAttributableToOwnersOfParent"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfReservesAndOtherEquityInterestExplanatory" xlink:label="DisclosureOfReservesAndOtherEquityInterestExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfReservesAndOtherEquityInterestExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:label="DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:label="DescriptionOfAccountingPolicyForLeasesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForLeasesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLoss" xlink:label="ProfitLoss"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInterestIncomeExplanatory" xlink:label="DisclosureOfInterestIncomeExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInterestIncomeExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RetainedEarnings" xlink:label="RetainedEarnings"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RetainedEarnings"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:label="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:label="DisclosureOfIncomeTaxExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfIncomeTaxExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="CashAndCashEquivalents"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CashAndCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DepreciationAndAmortisationExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInventoriesExplanatory" xlink:label="DisclosureOfInventoriesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInventoriesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:label="AdjustmentsForIncreaseDecreaseInOtherLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForIncreaseDecreaseInOtherLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RevenueFromInterest" xlink:label="RevenueFromInterest"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="RevenueFromInterest"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialGuaranteesExplanatory" xlink:label="DescriptionOfAccountingPolicyForFinancialGuaranteesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForFinancialGuaranteesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_CostOfLegalRiskRelatedToForeignCurrencyLoans" xlink:label="CostOfLegalRiskRelatedToForeignCurrencyLoans"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CostOfLegalRiskRelatedToForeignCurrencyLoans"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" xlink:label="DisclosureOfInterestIncomeExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInterestIncomeExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:label="DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherIncome" xlink:label="OtherIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:label="DescriptionOfAccountingPolicyForSegmentReportingExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForSegmentReportingExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfLoansAndAdvancesToCustomersExplanatory" xlink:label="DisclosureOfLoansAndAdvancesToCustomersExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfLoansAndAdvancesToCustomersExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AccumulatedOtherComprehensiveIncome" xlink:label="AccumulatedOtherComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AccumulatedOtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:label="DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:label="DisclosureOfOtherLiabilitiesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfOtherLiabilitiesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" xlink:label="DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForProvisions" xlink:label="AdjustmentsForProvisions"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForProvisions"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CountryOfIncorporation" xlink:label="CountryOfIncorporation"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="CountryOfIncorporation"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets" xlink:label="AdjustmentsForDecreaseIncreaseInOtherAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="AdjustmentsForDecreaseIncreaseInOtherAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:label="DisclosureOfCashFlowStatementExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfCashFlowStatementExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:label="DisclosureOfTaxReceivablesAndPayablesExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfTaxReceivablesAndPayablesExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:label="DescriptionOfAccountingPolicyForIssuedCapitalExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForIssuedCapitalExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfDepositsFromBanksExplanatory" xlink:label="DisclosureOfDepositsFromBanksExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfDepositsFromBanksExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:label="DisclosureOfEntitysReportableSegmentsExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfEntitysReportableSegmentsExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForRecognisingDifferenceBetweenFairValueAtInitialRecognitionAndAmountDeterminedUsingValuationTechniqueExplanatory" xlink:label="DescriptionOfAccountingPolicyForRecognisingDifferenceBetweenFairValueAtInitialRecognitionAndAmountDeterminedUsingValuationTechniqueExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DescriptionOfAccountingPolicyForRecognisingDifferenceBetweenFairValueAtInitialRecognitionAndAmountDeterminedUsingValuationTechniqueExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Assets" xlink:label="Assets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Assets"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_FinancialLiabilitiesHeldForTradingAndHedgingDerivatives" xlink:label="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfInterestExpenseExplanatory" xlink:label="DisclosureOfInterestExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfInterestExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_LoansAndAdvancesToBanks" xlink:label="LoansAndAdvancesToBanks"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="LoansAndAdvancesToBanks"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DisclosureOfFeeAndCommissionIncomeExpenseExplanatory" xlink:label="DisclosureOfFeeAndCommissionIncomeExpenseExplanatory"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="DisclosureOfFeeAndCommissionIncomeExpenseExplanatory"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestRevenueCalculatedUsingEffectiveInterestMethod" xlink:label="InterestRevenueCalculatedUsingEffectiveInterestMethod"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="InterestRevenueCalculatedUsingEffectiveInterestMethod"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Equity" xlink:label="Equity_3"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Equity_3"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.mbank.pl/xbrl/2022/Role/6/Anchoring">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue" xlink:label="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_EquityInstrumentsMandatorilyMeasuredAtFairValue" xlink:label="EquityInstrumentsMandatorilyMeasuredAtFairValue_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue_2" xlink:to="EquityInstrumentsMandatorilyMeasuredAtFairValue_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_DebtSecuritiesMandatorilyMeasuredAtFairValue" xlink:label="DebtSecuritiesMandatorilyMeasuredAtFairValue_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue_2" xlink:to="DebtSecuritiesMandatorilyMeasuredAtFairValue_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue" xlink:label="LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue_2" xlink:to="LoansAndAdvancesToCustomersMandatorilyMeasuredAtFairValue_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtAmortisedCost" xlink:label="FinancialAssetsAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_DebtSecuritiesMeasuredAtAmortisedCost" xlink:label="DebtSecuritiesMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtAmortisedCost_2" xlink:to="DebtSecuritiesMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_LoansAndAdvancesToCustomersMeasuredAtAmortisedCost" xlink:label="LoansAndAdvancesToCustomersMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtAmortisedCost_2" xlink:to="LoansAndAdvancesToCustomersMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Assets" xlink:label="Assets_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_PropertyPlantAndEquipmentAndRightOfUse" xlink:label="PropertyPlantAndEquipmentAndRightOfUse_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="Assets_2" xlink:to="PropertyPlantAndEquipmentAndRightOfUse_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty" xlink:label="RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="PropertyPlantAndEquipmentAndRightOfUse_2" xlink:to="RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="PropertyPlantAndEquipmentAndRightOfUse_2" xlink:to="PropertyPlantAndEquipment"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" xlink:label="FinancialAssetsAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_FinancialAssetsHeldForTradingAndHedgingDerivatives" xlink:label="FinancialAssetsHeldForTradingAndHedgingDerivatives_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsAtFairValueThroughProfitOrLoss" xlink:to="FinancialAssetsHeldForTradingAndHedgingDerivatives_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading" xlink:label="FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsHeldForTradingAndHedgingDerivatives_2" xlink:to="FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DerivativeFinancialAssets" xlink:label="DerivativeFinancialAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialAssetsHeldForTradingAndHedgingDerivatives_2" xlink:to="DerivativeFinancialAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCost" xlink:label="FinancialLiabilitiesAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AmountsDueToBanksMeasuredAtAmortisedCost" xlink:label="AmountsDueToBanksMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialLiabilitiesAtAmortisedCost_2" xlink:to="AmountsDueToBanksMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AmountsDueToCustomersMeasuredAtAmortisedCost" xlink:label="AmountsDueToCustomersMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialLiabilitiesAtAmortisedCost_2" xlink:to="AmountsDueToCustomersMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_Equity" xlink:label="Equity_4"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ShareCapital" xlink:label="ShareCapital_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="Equity_4" xlink:to="ShareCapital_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IssuedCapital" xlink:label="IssuedCapital_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ShareCapital_2" xlink:to="IssuedCapital_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_SharePremium" xlink:label="SharePremium_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ShareCapital_2" xlink:to="SharePremium_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RevenueFromInterest" xlink:label="RevenueFromInterest_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:label="IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="RevenueFromInterest_2" xlink:to="IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_InterestIncomeOnFinancialAssetsHeldForTrading" xlink:label="InterestIncomeOnFinancialAssetsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncomeSimilarToInterestOnFinancialAssetsAtFairValueThroughProfitOrLoss_2" xlink:to="InterestIncomeOnFinancialAssetsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow" xlink:label="OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesOnInvestingActivities" xlink:label="GainsLossesOnInvestingActivities_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow" xlink:to="GainsLossesOnInvestingActivities_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ProfitLossFromOperatingActivities_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_NetTradingIncomeExpense" xlink:label="NetTradingIncomeExpense_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ProfitLossFromOperatingActivities_2" xlink:to="NetTradingIncomeExpense_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_TradingIncomeExpense" xlink:label="TradingIncomeExpense"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="TradingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading" xlink:label="GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnFinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading" xlink:label="GainsLossesOnFinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="GainsLossesOnFinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnHedgingInstrument" xlink:label="GainsLossesOnHedgingInstrument"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="GainsLossesOnHedgingInstrument"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnHedgedItemAttributableToHedgedRisk" xlink:label="GainsLossesOnHedgedItemAttributableToHedgedRisk"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="GainsLossesOnHedgedItemAttributableToHedgedRisk"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainLossOnHedgeIneffectiveness" xlink:label="GainLossOnHedgeIneffectiveness"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="GainLossOnHedgeIneffectiveness"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_NetForeignExchangeGain" xlink:label="NetForeignExchangeGain"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="NetTradingIncomeExpense_2" xlink:to="NetForeignExchangeGain"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss" xlink:label="GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ProfitLossFromOperatingActivities_2" xlink:to="GainsLossesArisingFromDerecognitionOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueThroughProfitOrLoss_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_CostOfLegalRiskRelatedToForeignCurrencyLoans" xlink:label="CostOfLegalRiskRelatedToForeignCurrencyLoans_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ProfitLossFromOperatingActivities_2" xlink:to="CostOfLegalRiskRelatedToForeignCurrencyLoans_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue" xlink:label="GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss" xlink:label="GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue" xlink:to="GainsLossesOnNonTradingFinancialAssetsMandatorilyAtFairValueThroughProfitOrLoss_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="IncreaseDecreaseThroughSharebasedPaymentTransactions_3"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees" xlink:label="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees_3"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncreaseDecreaseThroughSharebasedPaymentTransactions_3" xlink:to="SharebasedPaymentTransactionsValueOfServicesProvidedByEmployees_3"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_SharebasedPaymentTransactionsSettlementOfExercisedOptions" xlink:label="SharebasedPaymentTransactionsSettlementOfExercisedOptions_3"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncreaseDecreaseThroughSharebasedPaymentTransactions_3" xlink:to="SharebasedPaymentTransactionsSettlementOfExercisedOptions_3"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" xlink:label="FinancialLiabilitiesAtFairValueThroughProfitOrLoss"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_FinancialLiabilitiesHeldForTradingAndHedgingDerivatives" xlink:label="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialLiabilitiesAtFairValueThroughProfitOrLoss" xlink:to="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading" xlink:label="FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_DerivativeFinancialLiabilities" xlink:label="DerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="FinancialLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="DerivativeFinancialLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:label="OtherAdjustmentsToReconcileProfitLoss"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInDepositsFromBanks" xlink:label="AdjustmentsForIncreaseDecreaseInDepositsFromBanks"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForIncreaseDecreaseInAmountsDueToBanksMeasuredAtAmortisedCost_2" xlink:to="AdjustmentsForIncreaseDecreaseInDepositsFromBanks"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInDepositsFromCustomers" xlink:label="AdjustmentsForIncreaseDecreaseInDepositsFromCustomers"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForIncreaseDecreaseInAmountsDueToCustomersMeasuredAtAmortisedCost_2" xlink:to="AdjustmentsForIncreaseDecreaseInDepositsFromCustomers"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome" xlink:label="ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="ChangesInFinancialAssetsAtFairValueThroughOtherComprehensiveIncome_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInSecuritiesAtAmortisedCost" xlink:label="ChangesInSecuritiesAtAmortisedCost_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="ChangesInSecuritiesAtAmortisedCost_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss" xlink:label="ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="ChangesOfNonTradingSecuritiesMandatorilyAtFairValueThroughProfitOrLoss_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives" xlink:label="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading" xlink:label="AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading" xlink:label="AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" xlink:label="AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" xlink:label="AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ChangesInFinancialAssetsAndLiabilitiesHeldForTradingAndHedgingDerivatives_2" xlink:to="AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_ChangesInIssuedDebtSecurities" xlink:label="ChangesInIssuedDebtSecurities_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="ChangesInIssuedDebtSecurities_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities" xlink:label="AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherAdjustmentsToReconcileProfitLoss" xlink:to="AdjustmentsForIncreaseDecreaseInAmountsDueToLeaseLibilities_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="RepaymentsOfBorrowingsClassifiedAsFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_RepaymentsOfLoansAndAdvancesFromBanks" xlink:label="RepaymentsOfLoansAndAdvancesFromBanks_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:to="RepaymentsOfLoansAndAdvancesFromBanks_2"/>
    <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_2"/>
    <link:loc xlink:type="locator" xlink:href="259400DZXF7UJKK2AY35-2022-12-31.xsd#mBank_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties" xlink:label="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties_2"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_2" xlink:to="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluationOfInvestmentProperties_2"/>
  </link:definitionLink>
</link:linkbase>
