from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Too apparent to be doubted; unquestionable.

from The Century Dictionary.

  • Not dubitable; too plain to admit of doubt: as, indubitable proof.
  • Synonyms See list under indisputable.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective clearly true; providing no possibility of doubt.
  • noun That which is indubitable.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective too obvious to be doubted


Sorry, no etymologies found.


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  • There must have been certain indubitable evidences by which a communication from heaven could be distinguished.

    Commentary Critical and Explanatory on the Whole Bible 1871

  • The unity of the spirit thus becomes and is known as indubitable fact, or rather (I must repeat) not as fact, as if it were or were anything before being known, but as something which is ever more and more coming to be, in the measure in which it is coming to be known -- known to itself.

    Progress and History Francis Sydney Marvin 1903

  • But we can distinguish strong rhetoric (for example, "indubitable" arguments that "hard evidence should count") from the obviously dubious or just plain silly.

    Science & 'The Demon-Haunted World': An Exchange Booth, Wayne C. 1997

  • Neither Joyce's finally intended "indubitable" nor his earliest "incurable" are mentioned in the synopsis.

    The Scandal of 'Ulysses' Kidd, John 1988

  • The synopsis and footnotes have no record of the typed "indubitable" which catalyzed the revision.

    The Scandal of 'Ulysses' Kidd, John 1988

  • Thus the typist's error "indubitable" ” which inspired Joyce to stitch in "unquestionably" ” is banned from the display of revisions in the Synoptic Edition.

    The Scandal of 'Ulysses' Kidd, John 1988

  • They were dreams come true, hard and indubitable realizations of fairy gossamers.

    Chapter XI 2010

  • That had been when Eliza Travers was being operated on for her eyes, and Frederick had kept it from her until indubitable proof came that Tom was still alive.


  • All in all, I would like to avoid the disaster that conservatives consider Souter, and therefore I would prefer a nominee like Wood, who has a lengthy record and indubitable liberal bonafides.

    The Volokh Conspiracy » Justice Kagan I Presume? 2010

  • And all that had vanished into the Nothingness was in the minds of the two dogs as they sang, and they sang back through the Nothingness to the land of Otherwhere, and ran once again with the Lost Pack, and yet were not entirely unaware of the present and of the indubitable two-legged god who was called Villa and who sang with them and loved them.



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