'Illegally' definitions:

Definition of 'illegally'

From: WordNet
adverb
In an illegal manner; "they dumped the waste illegally" [syn: illegally, illicitly, lawlessly] [ant: lawfully, legitimately, licitly]

Definition of 'Illegally'

From: GCIDE
  • Illegally \Il*le"gal*ly\, adv. In a illegal manner; unlawfully. [1913 Webster]