invalidate

[in-val-i-deyt]

verb (used with object)

invalidated, invalidating 

1. to render invalid; discredit.

   Synonyms: rebut, refute, disprove, impair, weaken

2. to deprive of legal force or efficacy; nullify.

invalidate

/ ɪnˈvælɪˌdeɪt /

verb

1. to render weak or ineffective, as an argument

2. to take away the legal force or effectiveness of; annul, as a contract

Other Word Forms

• invalidation noun
• invalidator noun

Word History and Origins

Origin of invalidate¹

First recorded in 1640–50; invalid ² + -ate ¹

Example Sentences

The court needn’t invalidate Section 2 to correct this imbalance.

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But to abandon his bike and take public transport would have invalidated his record after cycling thousands of kilometres over more than 60 days.

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Kalshi’s rise has been one of the most significant industry developments since the Supreme Court in 2018 invalidated a federal law prohibiting states from authorizing sports betting.

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The Nashville Church of Christ then sued Grant and her relatives, seeking to invalidate the requirements of the 1925 church deed.

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“The IRS deemed that if you participate in one of these it invalidates your ability to contribute to an HSA. That restriction has been removed,” Robertson says.

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Related Words

• abolish 
• abrogate 
• annul 
• discredit 
• disqualify 
• impair 
• negate 
• nullify 
• overrule 
• quash 
• revoke 
• undermine 
• undo