invalidate (C1)

verb

Pronunciation: /ɪnˈvælɪdeɪt/

Definition

Make something legally or logically null, void, or ineffective.

Examples

• Failure to sign the document will invalidate the entire contract.

• New evidence emerged that served to invalidate his previous testimony.

• The warranty is void if you attempt to invalidate the security seal.

How to Use invalidate

invalidate a contract (collocation)

to legally end an agreement — "The breach of terms will invalidate the contract."

invalidate a claim (collocation)

to prove a statement is false or unsupported — "New data helped invalidate his earlier claim."

Synonyms of invalidate

Words with a similar meaning to invalidate:

• cancel
• void
• nullify
• negate

Antonyms of invalidate

Words with the opposite meaning to invalidate:

• validate
• ratify

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