'Illegitimately' definitions:

Definition of 'illegitimately'

(from WordNet)
adverb
In a manner disapproved or not allowed by custom; "He acted illegitimately when he increased the rent fourfold" [syn: illegitimately, illicitly] [ant: lawfully, legitimately, licitly]
adverb
Of biological parents not married to each other; "this child was born illegitimately" [syn: illegitimately, out of wedlock] [ant: legitimately]

Definition of 'Illegitimately'

From: GCIDE
  • Illegitimately \Il`le*git"i*mate*ly\, adv. In a illegitimate manner; unlawfully. [1913 Webster]