invalidate

American

[in-val-i-deyt] / ɪnˈvæl ɪˌdeɪt /

verb (used with object)

invalidated, invalidating

to render invalid; discredit.

Synonyms:

rebut, refute, disprove, impair, weaken
to deprive of legal force or efficacy; nullify.

invalidate British

/ ɪnˈvælɪˌdeɪt /

verb

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

invalidation noun
invalidator noun

Etymology

Origin of invalidate

First recorded in 1640–50; invalid ² + -ate ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A finding of undue influence can invalidate a will or trust if your grandmother was pressured, manipulated or dependent on your mother.

From MarketWatch

“You must not attempt to use your visa as it has been invalidated,” said the email Bior received last year in April from the State Department.

From The Wall Street Journal

One doctor never examined her, while another barely spoke to her; either of these issues could invalidate competency declarations and expose medical misconduct, fraud and/or conspiracy.

From MarketWatch

They say the new guidance violates multiple federal laws, including laws that govern federal spending and rule changes, and are asking the federal court to immediately invalidate the guidance as unlawful.

From Los Angeles Times

Despite the Supreme Court invalidating tariffs, the process for retailers to secure refunds, or for shoppers to receive them, remains unclear.

From Barron's

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023