in·​val·​id·​i·​ty | \ ˌin-və-ˈli-də-tē How to pronounce invalidity (audio) , -va- \
plural invalidities

Definition of invalidity

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 Echelon’s invalidity arguments are similar to those raised by Flywheel over related patents., "Bath Iron Works lays off workers because of strike," 8 July 2020 There’s no question that Trump turned McCabe’s firing into a political cudgel, gleefully tweeting about his ouster and claiming it as more proof of the invalidity of the Russia investigation. Jen Kirby, Vox, "Andrew McCabe’s wife speaks out on Trump’s attacks," 3 Apr. 2018 The loss before the nation’s top patent court came a week after J&J’s Janssen Biotech unit got hit with an invalidity ruling on another blockbuster, the cancer drug Zytiga. Susan Decker,, "Johnson & Johnson Loses Remicade Patent in Appeal Ruling," 23 Jan. 2018 The invalidity or unenforceability of any provision of these rules shall not affect the validity or enforceability of any other provision. Emily Jan, The Atlantic, "Have You Entered Our Instagram Contest Yet?," 17 Oct. 2017 Creating an air of invalidity was exactly what Madrid sought to achieve. Time, Time, "'I Feel Anger I Never Had Inside Me.' On the Ground with Catalonians Fighting to Vote," 2 Oct. 2017 The invalidity or unenforceability of any provision of these rules shall not affect the validity or enforceability of any other provision. Emily Jan, The Atlantic, "Where Is The Atlantic Taking You?," 8 Aug. 2017 Generally, only the U.S. Patent and Trademark Office can officially invalidate a patent, although a jury’s finding of invalidity likely would de-weaponize the patent for other litigation purposes. David Kravets, WIRED, "Who Cheated Whom? Apple v. Samsung Patent Showdown Explained," 27 July 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'invalidity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of invalidity

circa 1550, in the meaning defined at sense 1

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The first known use of invalidity was circa 1550

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Cite this Entry

“Invalidity.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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English Language Learners Definition of invalidity

: the state of having no force or effect : the state of being invalid
British : the state or condition of being unable to work because of illness or injury : the state or condition of being an invalid


in·​val·​id·​i·​ty | \ ˌin-və-ˈlid-ət-ē, -va- How to pronounce invalidity (audio) \
plural invalidities

Medical Definition of invalidity

1 : incapacity to work because of prolonged illness or disability


in·​va·​lid·​i·​ty | \ ˌin-və-ˈli-də-tē How to pronounce invalidity (audio) \

Legal Definition of invalidity

: lack of validity : state of being invalid

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