adj. Prohibited; not permitted by law (either civil or criminal law; see illegal).
the GNU version of the Collaborative International Dictionary of English
adj. Not lawful; contrary to law.
The Century Dictionary and Cyclopedia
Not lawful; contrary to law; illegal; not permitted by law, human or divine; not legalized: as, an unlawful act; an unlawful oath; an unlawful society.
Begotten out of wedlock; illegitimate.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. contrary to or forbidden by law
adj. not conforming to legality, moral law, or social convention
adj. not morally right or permissible
adj. having no legally established claim
adj. contrary to or prohibited by or defiant of law
Word Usage
"JEANNE MESERVE, HOMELAND SECURITY CORRESPONDENT: Wolf, the American Civil Liberties Union is suing the secretary of homeland security over what it calls unlawful searches and detentions at airports."