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invalidate

[ in-val-i-deyt ]
/ 瑟n藞v忙l 瑟藢de瑟t /
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See synonyms for: invalidate / invalidated / invalidates / invalidating on Thesaurus.com

verb (used with object), in路val路i路dat路ed, in路val路i路dat路ing.
to render invalid; discredit.
to deprive of legal force or efficacy; nullify.
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鈥淲as鈥 is used for the indicative past tense of 鈥渢o be,鈥 and 鈥渨ere鈥 is only used for the subjunctive past tense.

Origin of invalidate

First recorded in 1640鈥50; invalid2 + -ate1

OTHER WORDS FROM invalidate

in路val路i路da路tion, nounin路val路i路da路tor, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2022

How to use invalidate in a sentence

British Dictionary definitions for invalidate

invalidate
/ (瑟n藞v忙l瑟藢de瑟t) /

verb (tr)
to render weak or ineffective, as an argument
to take away the legal force or effectiveness of; annul, as a contract

Derived forms of invalidate

invalidation, nouninvalidator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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