invalidate.
To make invalid (especially in to contract law)
Meaning & usage
To make invalid (especially in to contract law)
The circuit court judge's ruling was invalidated by a superior judge.
To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
To render invalid; discredit.
Telling an angry person to "calm down" can invalidate their feelings.
Where this word comes from
First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.