<?xml version="1.0" encoding="UTF-8"?>
<!-- XBRL document created with DocuBuilder 4.7 by Data Communique, Inc. -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:columbia="http://columbia/20121107" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Series" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#SeriesOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Class" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ClassOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Prospectus" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ProspectusOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceTableData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceTableData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ExpenseExample" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ExpenseExample"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/OperatingExpensesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#OperatingExpensesData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ShareholderFeesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ShareholderFeesData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasure" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceMeasureOnly"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataAAAA" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataAAAA"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleAAAA" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleAAAA"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataAAAA" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataAAAA"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataAAAA" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataAAAA"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataAAAA" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataAAAA"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataBBBB" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataBBBB"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleBBBB" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleBBBB"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataBBBB" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataBBBB"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataBBBB" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataBBBB"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataBBBB" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataBBBB"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataCCCC" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataCCCC"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleCCCC" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleCCCC"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataCCCC" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataCCCC"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataCCCC" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataCCCC"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataCCCC" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataCCCC"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataDDDD" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataDDDD"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleDDDD" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleDDDD"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataDDDD" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataDDDD"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataDDDD" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataDDDD"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataDDDD" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataDDDD"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataEEEE" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataEEEE"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleEEEE" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleEEEE"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataEEEE" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataEEEE"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataEEEE" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataEEEE"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataEEEE" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataEEEE"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataFFFF" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataFFFF"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleFFFF" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleFFFF"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataFFFF" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataFFFF"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataFFFF" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataFFFF"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataFFFF" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataFFFF"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataGGGG" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataGGGG"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleGGGG" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleGGGG"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataGGGG" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataGGGG"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataGGGG" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataGGGG"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataGGGG" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataGGGG"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataHHHH" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataHHHH"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleHHHH" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleHHHH"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataHHHH" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataHHHH"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataHHHH" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataHHHH"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataHHHH" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataHHHH"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataIIII" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataIIII"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleIIII" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleIIII"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataIIII" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataIIII"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataIIII" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataIIII"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataIIII" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataIIII"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataJJJJ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataJJJJ"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleJJJJ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleJJJJ"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataJJJJ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataJJJJ"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataJJJJ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataJJJJ"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataJJJJ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataJJJJ"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataKKKK" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataKKKK"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleKKKK" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleKKKK"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataKKKK" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataKKKK"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataKKKK" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataKKKK"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataKKKK" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataKKKK"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataLLLL" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataLLLL"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleLLLL" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleLLLL"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataLLLL" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataLLLL"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataLLLL" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataLLLL"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataLLLL" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataLLLL"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataMMMM" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataMMMM"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleMMMM" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleMMMM"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataMMMM" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataMMMM"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataMMMM" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataMMMM"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataMMMM" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataMMMM"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataNNNN" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataNNNN"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleNNNN" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleNNNN"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataNNNN" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataNNNN"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataNNNN" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataNNNN"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataNNNN" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataNNNN"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataOOOO" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataOOOO"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleOOOO" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleOOOO"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataOOOO" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataOOOO"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataOOOO" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataOOOO"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataOOOO" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataOOOO"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataPPPP" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataPPPP"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExamplePPPP" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExamplePPPP"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataPPPP" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataPPPP"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataPPPP" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataPPPP"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataPPPP" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataPPPP"/>
  <link:roleRef roleURI="http://columbia/role/PerformanceTableDataQQQQ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#PerformanceTableDataQQQQ"/>
  <link:roleRef roleURI="http://columbia/role/ExpenseExampleQQQQ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ExpenseExampleQQQQ"/>
  <link:roleRef roleURI="http://columbia/role/OperatingExpensesDataQQQQ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#OperatingExpensesDataQQQQ"/>
  <link:roleRef roleURI="http://columbia/role/ShareholderFeesDataQQQQ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#ShareholderFeesDataQQQQ"/>
  <link:roleRef roleURI="http://columbia/role/BarChartDataQQQQ" xlink:type="simple" xlink:href="cik0001097519-2012110801.xsd#BarChartDataQQQQ"/>
  <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/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/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Prospectus">
    <link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_DocumentDomain" xlink:label="DocumentDomain"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_AAAAMember" xlink:label="AAAAMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="AAAAMember" use="optional" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_BBBBMember" xlink:label="BBBBMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="BBBBMember" use="optional" order="3.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_CCCCMember" xlink:label="CCCCMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="CCCCMember" use="optional" order="4.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_DDDDMember" xlink:label="DDDDMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="DDDDMember" use="optional" order="5.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_EEEEMember" xlink:label="EEEEMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="EEEEMember" use="optional" order="6.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_FFFFMember" xlink:label="FFFFMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="FFFFMember" use="optional" order="7.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_GGGGMember" xlink:label="GGGGMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="GGGGMember" use="optional" order="8.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_HHHHMember" xlink:label="HHHHMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="HHHHMember" use="optional" order="9.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_IIIIMember" xlink:label="IIIIMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="IIIIMember" use="optional" order="10.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_JJJJMember" xlink:label="JJJJMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="JJJJMember" use="optional" order="11.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_KKKKMember" xlink:label="KKKKMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="KKKKMember" use="optional" order="12.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_LLLLMember" xlink:label="LLLLMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="LLLLMember" use="optional" order="13.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_MMMMMember" xlink:label="MMMMMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="MMMMMember" use="optional" order="14.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_NNNNMember" xlink:label="NNNNMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="NNNNMember" use="optional" order="15.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_OOOOMember" xlink:label="OOOOMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="OOOOMember" use="optional" order="16.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_PPPPMember" xlink:label="PPPPMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="PPPPMember" use="optional" order="17.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_QQQQMember" xlink:label="QQQQMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="QQQQMember" use="optional" order="18.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Series">
    <link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010780Member" xlink:label="S000010780Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010780Member" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010794Member" xlink:label="S000010794Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010794Member" order="3.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010803Member" xlink:label="S000010803Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010803Member" order="4.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010792Member" xlink:label="S000010792Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010792Member" order="5.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010789Member" xlink:label="S000010789Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010789Member" order="6.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010795Member" xlink:label="S000010795Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010795Member" order="7.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010804Member" xlink:label="S000010804Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010804Member" order="8.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010778Member" xlink:label="S000010778Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010778Member" order="9.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010797Member" xlink:label="S000010797Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010797Member" order="10.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010793Member" xlink:label="S000010793Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010793Member" order="11.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010802Member" xlink:label="S000010802Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010802Member" order="12.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010777Member" xlink:label="S000010777Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010777Member" order="13.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010799Member" xlink:label="S000010799Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010799Member" order="14.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010774Member" xlink:label="S000010774Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010774Member" order="15.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010785Member" xlink:label="S000010785Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010785Member" order="16.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010796Member" xlink:label="S000010796Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010796Member" order="17.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010825Member" xlink:label="S000010825Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010825Member" order="18.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010826Member" xlink:label="S000010826Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010826Member" order="19.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_S000010827Member" xlink:label="S000010827Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000010827Member" order="20.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Class">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_ShareClassDomain" xlink:label="ShareClassDomain"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122571Member" xlink:label="C000122571Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122571Member" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029860Member" xlink:label="C000029860Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029860Member" order="3.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122590Member" xlink:label="C000122590Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122590Member" order="4.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029850Member" xlink:label="C000029850Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029850Member" order="5.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029837Member" xlink:label="C000029837Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029837Member" order="6.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122583Member" xlink:label="C000122583Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122583Member" order="7.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029904Member" xlink:label="C000029904Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029904Member" order="8.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122570Member" xlink:label="C000122570Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122570Member" order="9.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029874Member" xlink:label="C000029874Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029874Member" order="10.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029855Member" xlink:label="C000029855Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029855Member" order="11.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029895Member" xlink:label="C000029895Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029895Member" order="12.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122568Member" xlink:label="C000122568Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122568Member" order="13.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029882Member" xlink:label="C000029882Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029882Member" order="14.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029775Member" xlink:label="C000029775Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029775Member" order="15.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029820Member" xlink:label="C000029820Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029820Member" order="16.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029869Member" xlink:label="C000029869Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029869Member" order="17.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122593Member" xlink:label="C000122593Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122593Member" order="18.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122594Member" xlink:label="C000122594Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122594Member" order="19.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000030056Member" xlink:label="C000030056Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000030056Member" order="20.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029803Member" xlink:label="C000029803Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029803Member" order="21.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122581Member" xlink:label="C000122581Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122581Member" order="22.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122591Member" xlink:label="C000122591Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122591Member" order="23.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122576Member" xlink:label="C000122576Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122576Member" order="24.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122574Member" xlink:label="C000122574Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122574Member" order="25.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029868Member" xlink:label="C000029868Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029868Member" order="26.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122592Member" xlink:label="C000122592Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122592Member" order="27.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029795Member" xlink:label="C000029795Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029795Member" order="28.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122586Member" xlink:label="C000122586Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122586Member" order="29.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122578Member" xlink:label="C000122578Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122578Member" order="30.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122588Member" xlink:label="C000122588Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122588Member" order="31.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122569Member" xlink:label="C000122569Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122569Member" order="32.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000121782Member" xlink:label="C000121782Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000121782Member" order="33.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122572Member" xlink:label="C000122572Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122572Member" order="34.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000121783Member" xlink:label="C000121783Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000121783Member" order="35.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000030053Member" xlink:label="C000030053Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000030053Member" order="36.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000030055Member" xlink:label="C000030055Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000030055Member" order="37.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122595Member" xlink:label="C000122595Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122595Member" order="38.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122582Member" xlink:label="C000122582Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122582Member" order="39.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029903Member" xlink:label="C000029903Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029903Member" order="40.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122577Member" xlink:label="C000122577Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122577Member" order="41.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122575Member" xlink:label="C000122575Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122575Member" order="42.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122579Member" xlink:label="C000122579Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122579Member" order="43.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122589Member" xlink:label="C000122589Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122589Member" order="44.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000029791Member" xlink:label="C000029791Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000029791Member" order="45.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122566Member" xlink:label="C000122566Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122566Member" order="46.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122573Member" xlink:label="C000122573Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122573Member" order="47.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122584Member" xlink:label="C000122584Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122584Member" order="48.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122580Member" xlink:label="C000122580Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122580Member" order="49.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122567Member" xlink:label="C000122567Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122567Member" order="50.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_C000122585Member" xlink:label="C000122585Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000122585Member" order="51.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasure">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk021AAAAMember" xlink:label="Benchmrk021AAAAMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk021AAAAMember" order="1112916.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk018AAAAMember" xlink:label="Benchmrk018AAAAMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk018AAAAMember" order="1112917.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk068BBBBMember" xlink:label="Benchmrk068BBBBMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk068BBBBMember" order="2211001.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txBBBBMember" xlink:label="Returnb4txBBBBMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txBBBBMember" order="2213052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txCCCCMember" xlink:label="Returnb4txCCCCMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txCCCCMember" order="3313052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk083CCCCMember" xlink:label="Benchmrk083CCCCMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk083CCCCMember" order="3313201.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk104DDDDMember" xlink:label="Benchmrk104DDDDMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk104DDDDMember" order="4413051.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk104EEEEMember" xlink:label="Benchmrk104EEEEMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk104EEEEMember" order="5513051.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk104FFFFMember" xlink:label="Benchmrk104FFFFMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk104FFFFMember" order="6613051.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txFFFFMember" xlink:label="Returnb4txFFFFMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txFFFFMember" order="6613052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk020FFFFMember" xlink:label="Benchmrk020FFFFMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk020FFFFMember" order="6613183.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk099GGGGMember" xlink:label="Benchmrk099GGGGMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk099GGGGMember" order="7713031.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txGGGGMember" xlink:label="Returnb4txGGGGMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txGGGGMember" order="7713052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk104HHHHMember" xlink:label="Benchmrk104HHHHMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk104HHHHMember" order="8813051.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txHHHHMember" xlink:label="Returnb4txHHHHMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txHHHHMember" order="8813052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk104IIIIMember" xlink:label="Benchmrk104IIIIMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk104IIIIMember" order="9913051.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txIIIIMember" xlink:label="Returnb4txIIIIMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txIIIIMember" order="9913052.0"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txJJJJMember" xlink:label="Returnb4txJJJJMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txJJJJMember" order="101013052"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk081JJJJMember" xlink:label="Benchmrk081JJJJMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk081JJJJMember" order="101013221"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk108KKKKMember" xlink:label="Benchmrk108KKKKMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk108KKKKMember" order="111112941"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk103LLLLMember" xlink:label="Benchmrk103LLLLMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk103LLLLMember" order="121211162"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txLLLLMember" xlink:label="Returnb4txLLLLMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txLLLLMember" order="121213052"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk081MMMMMember" xlink:label="Benchmrk081MMMMMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk081MMMMMember" order="131313221"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk014NNNNMember" xlink:label="Benchmrk014NNNNMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk014NNNNMember" order="141410371"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_bench2011072701OOOOMember" xlink:label="bench2011072701OOOOMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="bench2011072701OOOOMember" order="151511091"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk110PPPPMember" xlink:label="Benchmrk110PPPPMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk110PPPPMember" order="161612951"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Benchmrk094QQQQMember" xlink:label="Benchmrk094QQQQMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Benchmrk094QQQQMember" order="171711171"/>
    <link:loc xlink:type="locator" xlink:href="cik0001097519-2012110801.xsd#columbia_Returnb4txQQQQMember" xlink:label="Returnb4txQQQQMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Returnb4txQQQQMember" order="171713052"/>
  </link:definitionLink>
</link:linkbase>
