- 1born to parents who are not married to each other See related entries: Family background
- 2(formal) not allowed by a particular set of rules or by law synonym unauthorized illegitimate use of company property Oxford Collocations Dictionary verbsbe, consider something, regard something as, … adverbcompletely See full entry See related entries: Justice opposite legitimate Word Originmid 16th cent.: from late Latin illegitimus (from in- ‘not’ + legitimus ‘lawful’), suggested by legitimate.
illegitimate
adjectiveBrE BrE//ˌɪləˈdʒɪtəmət//; NAmE NAmE//ˌɪləˈdʒɪtəmət//
Justice, Family backgroundCheck pronunciation: illegitimate