verb
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to render weak or ineffective, as an argument
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to take away the legal force or effectiveness of; annul, as a contract
Other Word Forms
- invalidation noun
- invalidator noun
Etymology
Origin of invalidate
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.
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
The courts may invalidate specious claims that certain imports threaten national security.
The ruling invalidates actions Lake took while running the agency between July and November 2025, including sweeping staff reductions and operational changes that sharply curtailed Voice of America’s operations.
From Salon
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
