<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--  
  This file is part of the Dutch Taxonomy (Nederlandse Taxonomie; NT)
  Intellectual Property of the State of the Netherlands
  Architecture: NT20
  Version: 20260121
  Release date: October 2025
-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="urn:bzk:linkrole:non-wsw-secured-loans-specification-consolidated-housing-dvi" xlink:href="../dictionary/bzk-dvi-linkroles-housing.xsd#bzk-dvi-lr_NonWswSecuredLoansSpecificationConsolidatedHousingDvi" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>
  <link:definitionLink xlink:role="urn:bzk:linkrole:non-wsw-secured-loans-specification-consolidated-housing-dvi" xlink:type="extended">
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_BranchActivity_loc" xlink:type="arc"/>
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanTypeLoan_loc" xlink:type="arc"/>
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredRedemptionFormLoan_loc" xlink:type="arc"/>
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanBorrower_loc" xlink:type="arc"/>
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanContractEndDate_loc" xlink:type="arc"/>
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanContractStartDate_loc" xlink:type="arc"/>
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanCouponDate1_loc" xlink:type="arc"/>
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanCouponDate2_loc" xlink:type="arc"/>
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanCouponFrequency_loc" xlink:type="arc"/>
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanDisclosure_loc" xlink:type="arc"/>
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanEurInterestPeriod_loc" xlink:type="arc"/>
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanEuriborPremiumPercentage_loc" xlink:type="arc"/>
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanGuaranteedBy_loc" xlink:type="arc"/>
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanInterestRate_loc" xlink:type="arc"/>
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanNameFinancier_loc" xlink:type="arc"/>
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-ww-i_NonWSWSecuredLoanRemainingLiability_loc" xlink:type="arc"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_BranchActivity" xlink:label="bzk-ww-i_BranchActivity_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanBorrower" xlink:label="bzk-ww-i_NonWSWSecuredLoanBorrower_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanContractEndDate" xlink:label="bzk-ww-i_NonWSWSecuredLoanContractEndDate_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanContractStartDate" xlink:label="bzk-ww-i_NonWSWSecuredLoanContractStartDate_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanCouponDate1" xlink:label="bzk-ww-i_NonWSWSecuredLoanCouponDate1_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanCouponDate2" xlink:label="bzk-ww-i_NonWSWSecuredLoanCouponDate2_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanCouponFrequency" xlink:label="bzk-ww-i_NonWSWSecuredLoanCouponFrequency_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanDisclosure" xlink:label="bzk-ww-i_NonWSWSecuredLoanDisclosure_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanEurInterestPeriod" xlink:label="bzk-ww-i_NonWSWSecuredLoanEurInterestPeriod_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanEuriborPremiumPercentage" xlink:label="bzk-ww-i_NonWSWSecuredLoanEuriborPremiumPercentage_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanGuaranteedBy" xlink:label="bzk-ww-i_NonWSWSecuredLoanGuaranteedBy_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanInterestRate" xlink:label="bzk-ww-i_NonWSWSecuredLoanInterestRate_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanNameFinancier" xlink:label="bzk-ww-i_NonWSWSecuredLoanNameFinancier_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanRemainingLiability" xlink:label="bzk-ww-i_NonWSWSecuredLoanRemainingLiability_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredLoanTypeLoan" xlink:label="bzk-ww-i_NonWSWSecuredLoanTypeLoan_loc" xlink:type="locator"/>
    <link:loc xlink:href="../../20251210/dictionary/bzk-ww-data.xsd#bzk-ww-i_NonWSWSecuredRedemptionFormLoan" xlink:label="bzk-ww-i_NonWSWSecuredRedemptionFormLoan_loc" xlink:type="locator"/>
    <link:loc xlink:href="http://www.nltaxonomie.nl/2013/xbrl/sbr-dimensional-concepts.xsd#sbr-dim_ValidationLineItems" xlink:label="sbr-dim_ValidationLineItems_loc" xlink:type="locator"/>
  </link:definitionLink>
</link:linkbase>
