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See more synonyms for undeniable on Thesaurus.com
  1. incapable of being denied or disputed: undeniable evidence of arson.
  2. not open to refusal: an undeniable call for help.
  3. unquestioned as to quality, merit, etc.; indisputably good: undeniable artistic talent.
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Origin of undeniable

First recorded in 1540–50; un-1 + deniable
Related formsun·de·ni·a·ble·ness, nounun·de·ni·a·bly, adverb


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for undeniable

Contemporary Examples

Historical Examples

  • That one example, moreover, has been a success as unqualified as undeniable.

    'Tis Sixty Years Since

    Charles Francis Adams

  • There were expenses of undeniable utility—the roads, ports, and railways.

  • All this would be justified by strong and undeniable circumstances.

  • But for all that, the pluck and tenacity of Ulstermen are undeniable.

    Ireland as It Is

    Robert John Buckley (AKA R.J.B.)

  • The scientific mind must have proof, undeniable, irrefutable proof.

    The Golden Woman

    Ridgwell Cullum

British Dictionary definitions for undeniable


  1. unquestionably or obviously true
  2. of unquestionable excellencea man of undeniable character
  3. unable to be resisted or denied
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Derived Formsundeniableness, 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 undeniable


1540s, from un- (1) "not" + deny + -able. Related: Undeniably.

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Online Etymology Dictionary, © 2010 Douglas Harper