invalidity
noun
in·val·id·i·ty
ˌin-və-ˈli-də-tē 
-va-
plural invalidities
1
: lack of validity or cogency
2
: incapacitating bodily disability
also
: invalidism
Examples of invalidity in a Sentence
the invalidity of the contract
an injured worker forced to live on invalidity benefit
Recent Examples on the Web
Miscellaneous The invalidity or unenforceability of any provision of these Official Rules or the Affidavit will not affect the validity or enforceability of any other provision.
—
USA TODAY, 22 Jan. 2025
This latest result has nothing to say about parallel universes, the multiverse, or the validity or invalidity of any of the still-viable interpretations of quantum mechanics.
—Big Think, 13 Dec. 2024
Gallagher’s greeting card company Full Colour Black started an invalidity action in March 2019 to cancel the EU trademark on the iconic mural, arguing that Banksy must copyright his work instead of registering trademarks to incorporate them.
—Sophie Mellor, Fortune, 21 Nov. 2022
The Supreme Court said its declaration of invalidity is retroactive to the date the 2011 law was enacted, meaning those who have been sentenced under the statute can now seek relief.
—Amanda Coletta, Washington Post, 27 May 2022
Label choice bias is far more common than subgroup invalidity.
—Carol McCall, STAT, 12 Aug. 2021
But patent invalidity suits—which test whether the patent claimed by the plaintiff is indeed valid and are the preferred defense for companies being sued for infringement—go through a special German patent court, which can take up to three times longer to render decisions.
—Bertrand Benoit, WSJ, 14 Mar. 2021
Echelon’s invalidity arguments are similar to those raised by Flywheel over related patents.
—BostonGlobe.com, 8 July 2020
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
USA TODAY, 22 Jan. 2025
This latest result has nothing to say about parallel universes, the multiverse, or the validity or invalidity of any of the still-viable interpretations of quantum mechanics.
—Big Think, 13 Dec. 2024
Gallagher’s greeting card company Full Colour Black started an invalidity action in March 2019 to cancel the EU trademark on the iconic mural, arguing that Banksy must copyright his work instead of registering trademarks to incorporate them.
—Sophie Mellor, Fortune, 21 Nov. 2022
The Supreme Court said its declaration of invalidity is retroactive to the date the 2011 law was enacted, meaning those who have been sentenced under the statute can now seek relief.
—Amanda Coletta, Washington Post, 27 May 2022
Label choice bias is far more common than subgroup invalidity.
—Carol McCall, STAT, 12 Aug. 2021
But patent invalidity suits—which test whether the patent claimed by the plaintiff is indeed valid and are the preferred defense for companies being sued for infringement—go through a special German patent court, which can take up to three times longer to render decisions.
—Bertrand Benoit, WSJ, 14 Mar. 2021
Echelon’s invalidity arguments are similar to those raised by Flywheel over related patents.
—BostonGlobe.com, 8 July 2020
Cite this Entry
“Invalidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invalidity. Accessed 3 Nov. 2025.
Copy CitationMedical Definition
invalidity
noun
in·val·id·i·ty
ˌin-və-ˈlid-ət-ē, -va-
plural invalidities
1
: incapacity to work because of prolonged illness or disability
2
Legal Definition
invalidity
noun
in·va·lid·i·ty
ˌin-və-ˈli-də-tē
: lack of validity : state of being invalid
Love words? Need even more definitions?
Merriam-Webster unabridged
Share