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English definition of “invalidate”

invalidate

verb [T]     /ɪnˈvælɪdeɪt/
to officially stop a document, contract, etc. being legally or officially acceptable: If you do not go to an approved garage, you are likely to invalidate a warranty on a new car. → Compare validate
invalidation noun [U]
(Definition of invalidate verb from the Cambridge Business English Dictionary © Cambridge University Press)
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