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Definition of "invalidate" []

  • To make invalid; nullify. (verb-transitive)
  • To render weak or ineffective, as an argument (verb)

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.

  • To take away the legal force or effectiveness of; annul, as a contract (verb)

www.Collinsdictionary.com (c) HarperCollins Publishers Ltd 2016

Use "invalidate" in a sentence
  • "FARRELL: I'm afraid I have to say that I think if the west started getting into the game of asking Muslim clerics to issue fatwas then it would put the clerics in a very difficult situation and it would kind of invalidate the fatwa if they did it because they would look like they're doing it at the behest of the west."
  • "Flash forward to the present, where Weaver and Quaintance last week filed a request in Superior Court to "invalidate" local governments 'approval of the hotel for federal stimulus funding."
  • "But at the same time it would kind of invalidate the whole series 'intent - choosing to demure about the hard, bloody climax doesn't pay proper respect to the costly sacrifices of sexual responsibilism that the books so ennoble."