'Illegality' definitions:

Definition of 'illegality'

From: WordNet
noun
Unlawfulness by virtue of violating some legal statute [ant: legality]

Definition of 'Illegality'

From: GCIDE
  • Illegality \Il`le*gal"i*ty\, n.; pl. Illegalities. [Cf. F. ill['e]galit['e].] The quality or condition of being illegal; unlawfulness; as, the illegality of trespass or of false imprisonment; also, an illegal act. [1913 Webster]