from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not sanctioned by custom or law; unlawful.
- adj. Linguistics Improperly formed; ungrammatical.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not approved by law, but not invalid.
- adj. Breaking social norms.
- adj. Unlawful.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not permitted or allowed; prohibited; unlawful
from The Century Dictionary and Cyclopedia
- Not authorized or permitted; prohibited; unlicensed; unlawful: as, illicit trade; illicit intercourse.
- Acting unlawfully; clandestine.
- Synonyms Unlawful, Illegitimate, etc. See lawful.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. contrary to or forbidden by law
- adj. contrary to accepted morality (especially sexual morality) or convention
Latin illicitus : in-, not; see in-1 + licitus, lawful; see licit.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French illicite, from Latin illicitus, from in- 'not' + licet ("it is allowed") (Wiktionary)