Definition of illegitimately adverb from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˌɪləˈdʒɪtəmətli//
    ; NAmE NAmE//ˌɪləˈdʒɪtəmətli//
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  1. 1to parents who are not married to each other a baby born illegitimately
  2. 2(formal) in a way that is not allowed by a particular set of rules or by law The government had illegitimately gained power.
  3. opposite legitimately