illegal
adjective
1. prohibited by law or by official or accepted rules
- an illegal chess move
Similar word(s): unlawful, amerciable, banned, prohibited, black, bootleg, contraband, smuggled, criminal, felonious, dirty, embezzled, misappropriated, extrajudicial, extralegal, nonlegal, hot, illegitimate, illicit, outlaw, outlawed, unlawful, ineligible, misbranded, mislabeled, penal, punishable, unratified, illegitimate, irregular
Sentences with illegal as an adjective:
- This is illegal, you know!
- Moving a pawn backward is an illegal move in chess.
- illegal immigrant;
noun
1. (colloquial, offensive) An illegal immigrant.
2. An illegal resident spy.