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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Without effective safeguards in place, there are considerable risks to all businesses along alcohol supply chains of becoming implicated in illicit trading.—Mark Littler, Forbes.com, 16 May 2025 And, there's always the strong possibility of the emergence of new, even more potent synthetic opioids—just like when fentanyl entered the illicit drug supply over a decade ago and caused an unprecedented number of deaths.—Jasmine Laws, MSNBC Newsweek, 15 May 2025 In between her shots at clowning stardom, Cherry makes impressive chains of bad decisions—most of them being illicit hookups with older women.—The Atlantic, 15 May 2025 In one jump-cut scene, the little girl scurries back to the noodle stop through the market while percussive music plays, bursting with fear and excitement at her new illicit hobby.—Jessica Kiang, Variety, 15 May 2025 See All Example Sentences for illicit
Word History
Etymology
Latin illicitus, from in- + licitus lawful — more at licit
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