Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Not sanctioned by custom or law; improper or unlawful.
  • adjective Linguistics Improperly formed; ungrammatical.

from The Century Dictionary.

  • Not authorized or permitted; prohibited; unlicensed; unlawful: as, illicit trade; illicit intercourse.
  • Acting unlawfully; clandestine.
  • Synonyms Unlawful, Illegitimate, etc. See lawful.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Not permitted or allowed; prohibited; unlawful

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective law Not approved by law, but not invalid.
  • adjective Breaking social norms.
  • adjective Unlawful.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective contrary to or forbidden by law
  • adjective contrary to accepted morality (especially sexual morality) or convention

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin illicitus : in-, not; see in– + licitus, lawful; see licit.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From French illicite, from Latin illicitus, from in- 'not' + licet ("it is allowed")

Examples

  • The term illicit device contained with the Copyright, Designs and Patents Act is argued to be limited to pirate or counterfeit decoders and therefore does not include decoders procured in this manner.

    BBC Ouch Blog

  • Bank Mellat officials have denied engaging in illicit business and have told Iranian state-owned media that the U.S. has never provided any evidence to back its claims.

    U.A.E. Cuts Off Ties to Iran Banks

  • Typically, the safety advice to travelers to Mexico is to avoid driving at night, don't wear flashy clothing or jewelry, don't engage in illicit conduct etc.

    It may not be a trend, but it does happen

  • The real fear over the bachelor girl was the state of her morals: a woman alone could engage in illicit relations with men and thus enjoy experiences formerly reserved for married women.

    The Bachelor Girl | Edwardian Promenade

  • Of course, there will be skeptics who will surmise that he had been involved in illicit activities which lead to his death.

    It may not be a trend, but it does happen

  • Typically, the safety advice to travelers to Mexico is to avoid driving at night, don't wear flashy clothing or jewelry, don't engage in illicit conduct etc.

    It may not be a trend, but it does happen

  • Prosecution of those who require marihuana for medical purposes did not achieve any of the three objectives of the CDSA identified by the Crown: preventing harm, international treaty obligations, and control of the trade in illicit drugs.

    The Solution is Insite, Part II : Law is Cool

  • Of course, there will be skeptics who will surmise that he had been involved in illicit activities which lead to his death.

    It may not be a trend, but it does happen

  • Of course, there will be skeptics who will surmise that he had been involved in illicit activities which lead to his death.

    It may not be a trend, but it does happen

  • Typically, the safety advice to travelers to Mexico is to avoid driving at night, don't wear flashy clothing or jewelry, don't engage in illicit conduct etc.

    It may not be a trend, but it does happen

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