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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North was convicted in 1989 on three felony charges for helping to arrange the illicit sale of weapons to Iran and divert the proceeds to fund a secret war against anti-communist Contra rebels in Nicaragua.—Josh Meyer, USA Today, 11 Sep. 2025 The Evolution of Payola Practices The music industry’s relationship with promotion has always been fraught, with major labels repeatedly scrutinized for illicit payola practices.—Jared Brenner, Forbes.com, 11 Sep. 2025 Arcángela and Serafina remain in the women’s penitentiary, continuing to operate illicit businesses and accumulating wealth, but without hope of freedom.—Isabella Wandermurem, Time, 10 Sep. 2025 These services are delivered through a variety of channels – such as illicit websites, preloaded streaming devices, and unauthorized applications – that make infringing content widely accessible to consumers.—Marcelo Cajueiro, Variety, 9 Sep. 2025 See All Example Sentences for illicit
Word History
Etymology
Latin illicitus, from in- + licitus lawful — more at licit
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