Definition of "illicit" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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