Pronunciation: /ɪnˈvælɪˌdeɪtɪd/
verb to render something invalid or null
A1 The teacher invalidated the student's answer because it was incorrect.
A2 The referee invalidated the goal due to a handball by the striker.
B1 The court invalidated the contract because it was not signed by both parties.
B2 The scientist's theory was invalidated by new evidence that contradicted his findings.
C1 The judge invalidated the search warrant because it was obtained illegally.
C2 The committee invalidated the election results due to widespread fraud.
adjective having been declared invalid or null
A1 The student's excuse for not completing the homework was invalidated by the teacher.
A2 Her argument was quickly invalidated by the presentation of solid evidence.
B1 The results of the experiment were invalidated due to a flaw in the methodology.
B2 The contract was invalidated because it was not signed by all parties involved.
C1 The court invalidated the law as it was found to be unconstitutional.
C2 The scientific community invalidated the theory after further research proved it to be incorrect.
formal The contract was invalidated due to a technicality in the wording.
informal They said my excuse was invalid, so I couldn't get out of going to the party.
slang The referee totally invalidated that call, it was so unfair.
figurative Her harsh words invalidated all of his efforts to make amends.
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