Pronunciation: /ɪnˈvælɪˌdeɪt/
verb to make something no longer valid or effective
A1 Using an expired coupon will invalidate the discount.
A2 Failure to provide proper identification may invalidate your claim.
B1 The court ruled that the evidence presented was not enough to invalidate the contract.
B2 A small error in the data could potentially invalidate the entire study.
C1 The new information presented during the trial could potentially invalidate the previous testimony.
C2 The discovery of new evidence could potentially invalidate the verdict of the previous trial.
formal The new evidence presented in court could potentially invalidate the previous witness testimony.
informal If you don't sign and date the form correctly, it might invalidate your application.
slang Using a fake ID could invalidate your chances of getting into the club.
figurative Her harsh words seemed to invalidate all of his hard work and effort.
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