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See more synonyms for invalidity on Thesaurus.com
  1. lack of validity.
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Origin of invalidity1

From the Medieval Latin word invaliditās, dating back to 1540–50. See invalid2, -ity


  1. invalidism.
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Origin of invalidity2

First recorded in 1905–10; invalid1 + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for invalidity

Historical Examples

  • The invalidity of "the principle of causality" is asserted by this author.

    Christianity and Greek Philosophy

    Benjamin Franklin Cocker

  • Here again it must be remarked that origin, does not carry validity or invalidity with it.


    James Sully

  • That is indicated by the power to set aside prejudices as soon as their invalidity is demonstrated.

  • Doubtless many another archaic statute is of a like invalidity did but some protestful person choose to take issue therewith.

    Dickens' London

    Francis Miltoun

  • Neither shall we be very careful to inquire into the validity or invalidity of the charges against his kinsfolk.

Word Origin and History for invalidity


1540s, from Latin invalidatus (see invalid (adj.)).

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Online Etymology Dictionary, © 2010 Douglas Harper