If administrators find out that students cheated on a test, the school might invalidate their class grades. To invalidate means to cancel something or make it void, as if it never happened.

  • Pronunciation: /ɪn'vælɪdet/
  • English description: make invalid for use
  • Synonyms: cancel
  • Chinese Translation:  使无效(shi3 wu2 xiao4)
  • Spanish Translation: invalidar
  • ORIGIN: In invalidate you see the word valid which means true or correct. When you invalidate something you are making it less true, less official, or less correct. If you buy something that doesn't work properly and then try to fix it yourself, you invalidate the warranty. If you have a wacky theory that cars grow from trees, your teacher might invalidate your theory by taking you on a tour of an auto factory.


  • A recent state Supreme Court decision invalidated the $1.4 billion project’s permit to build on conservation land, which could delay construction by several years.
  • The language would invalidate recent court rulings regarding Caesars’ debt restructuring that Caesars disagrees with.

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