defaulterEnglishOxford American Thesaurusdefaulter noun 1 a mortgage defaulter: nonpayer, debt dodger; tax dodger; informal welsher, bilker; North American delinquent; British, archaic levanter. 2 Militaryhe was confined to the defaulters' room: minor offender, wrongdoer, felon, delinquent, malefactor, culprit; archaic miscreant.