To make invalid. Especially applied 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.
First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.
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