See more synonyms for undoubted on Thesaurus.com

Origin of undoubted

late Middle English word dating back to 1425–75; see origin at un-1, doubt, -ed2
Related formsun·doubt·ed·ly, adverb

Synonym study

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

Examples from the Web for undoubtedly

Contemporary Examples of undoubtedly

Historical Examples of undoubtedly

  • Much, nay most, of this was undoubtedly owing to the genius of the songstress.

  • It was undoubtedly a facer; but Scottie came back in his usual calm manner.

  • Undoubtedly he was possessed of a tremendous regard for the girl Allis.


    W. A. Fraser

  • Physically he had undoubtedly improved; his legs had hardened and smoothed down.


    W. A. Fraser

  • John Porter was undoubtedly brightened by the daughter's visit.


    W. A. Fraser

British Dictionary definitions for undoubtedly


  1. certainly or definitely; unquestionablyhe is undoubtedly talented
  2. (sentence modifier) without doubt; certainly or indisputablyundoubtedly there will be changes


  1. beyond doubt; certain or indisputable
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 undoubtedly



mid-15c., from un- (1) "not" + past participle of doubt (v.).

Online Etymology Dictionary, © 2010 Douglas Harper