Guest

invalidate

/ˌɪnˈvæl.ɪ.deɪt/ · in.val.i.date
verb
  1. To make invalid, especially in contract law. The circuit court judge's ruling was invalidated by a superior judge.
  2. To render something ineffective or null and void. The company's insurance policy was invalidated due to a pre-existing condition.
noun
  1. The act of making something invalid. The judge's decision to invalidate the contract was met with controversy.

Synonyms

Antonyms

Did you know? The word 'invalidate' is often used in contract law to signify the act of making a contract or agreement null and void, often due to a breach of terms or conditions.
Written by Lexi Wordsworth, Dictionary Editor 7 lookups Added Jul 23, 2026