Definition of invalidation noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪnˌvælɪˈdeɪʃn//
    ; NAmE NAmE//ɪnˌvælɪˈdeɪʃn//
    [uncountable] invalidation (of something)
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  1. 1the act of saying that a document, contract, election, etc. is no longer legally or officially valid or acceptable the invalidation of the regulation by the High Court opposite validation
  2. 2the act of proving that an idea, a story, an argument, etc. is wrong the invalidation of the theory