1. invalidation (of something) the act of saying that a document, contract, election, etc. is no longer legally or officially acceptable
   • ● the invalidation of the regulation by the High Court
   Antonym : validationTopics
2. invalidation (of something) the act of proving that an idea, a story, an argument, etc. is wrong
   • ● the invalidation of the theory
   Topics

[TahlilGaran] English Dictionary ▲