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TOEFL BNC: 14319 COCA: 14552

invalidate

Word family
in·val·i·date /ɪnˈvælədeɪt/ ●○○ AWL verb [transitiveT]  
1 USE somethingto make a document, ticket, claim etc no longer legally or officially acceptable 使无效,使作废
 Failure to disclose all relevant changes may invalidate your policy.
未能披露所有的相关变化会令保单无效。
2 WRONG/INCORRECTto show that something such as a belief or explanation is wrong 证明〔信念、解释等〕错误
 Later findings invalidated the theory.
后来的发现推翻了这一理论。
Examples from the Corpus
From Longman Business Dictionary
invalidatein·val·i·date /ɪnˈvælədeɪt/ verb [transitiveT]
LAW to make a contract, agreement, document etc invalid
Failure to follow the instructions correctly could invalidate the guarantee.
The Judge’s ruling invalidated the company’s patent.
invalidation noun [uncountableU]
The Court of Appeals refused to reconsider its previous invalidation of the contract.
in·val·i·date verb
Chinese
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