invalidate

[ in-val-i-deyt ]
/ ɪnˈvæl ɪˌdeɪt /

verb (used with object), in·val·i·dat·ed, in·val·i·dat·ing.

to render invalid; discredit.
to deprive of legal force or efficacy; nullify.

Nearby words

  1. invader,
  2. invaginable,
  3. invaginate,
  4. invagination,
  5. invalid,
  6. invalidation,
  7. invalides, hôtel des,
  8. invalidism,
  9. invalidity,
  10. invalidity benefit

Origin of invalidate

First recorded in 1640–50; invalid2 + -ate1

Related formsin·val·i·da·tion, nounin·val·i·da·tor, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for invalidate


British Dictionary definitions for invalidate

invalidate

/ (ɪnˈvælɪˌdeɪt) /

verb (tr)

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

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

Word Origin and History for invalidate

invalidate

v.

1640s, from invalid + -ate (2). Related: Invalidated; invalidating.

Online Etymology Dictionary, © 2010 Douglas Harper