Illicit, while not exactly an everyday word, is far more common than its antonym, licit ("not forbidden by law, permissible"). Perhaps this is a function of our oft-noted fascination with bad behavior and boredom with rectitude. In any case, illicit may be used of behavior that is either unlawful or immoral. These categories frequently overlap, but they are not always synonymous, as some unlawful activities (illicit cigarette smoking) may not be considered immoral, while some immoral activities (an illicit affair) are not illegal. Illicit is occasionally confused with elicit because of the similarity in their pronunciations, but the two words have decidedly different meanings and functions: in contemporary English, elicit is a verb meaning "to get (a response, information, etc.) from someone," while illicit appears solely as an adjective.
The wedding is mounted in traditional Punjabi style, but underneath the formal fanfare simmer dysfunctional-family tensions, deep dark secrets, … and illicit affairs.—David Ansen, Newsweek, 4 Mar. 2002"Thank you, Lieutenant," she said, bowing her head, just as she might in everyday, civilian life, and I felt suddenly illicit in her presence, as though we'd slipped out of sight of our chaperons …—Chang-rae Lee, A Gesture Life, 1999The companies that carry cellular … have adopted a number of monitoring techniques to detect illicit calls …—Paul Wallich, Scientific American, March 1994
He was arrested for selling illicit copies of the software.
She had an illicit affair with her boss.
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And the same evidence that linked children to biological relatives could spur a criminal case against their adoptive parents, some of whom had ties to the military and its illicit actions.—Julia M. Klein, The Atlantic, 11 July 2025 In Sarasota, Hoffman told reporters an illicit casino in his jurisdiction also refused to pay a woman who reportedly won a $4,000 jackpot.—Josh Salman, Miami Herald, 11 July 2025 His actions, along with his willingness to launder money from drugs proceeds, is no different than those individuals flooding our streets with illicit and diverted narcotics, exasperating an already addictive and deadly opioid crisis.—Gabe Whisnant, MSNBC Newsweek, 10 July 2025 With taxes like these, no wonder the illicit marijuana market continues to flourish.—The Editorial Board, Oc Register, 9 July 2025 See All Example Sentences for illicit
Word History
Etymology
Latin illicitus, from in- + licitus lawful — more at licit
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