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[in-doo-bi-tuh-buh l, -dyoo-] /ɪnˈdu bɪ tə bəl, -ˈdyu-/
that cannot be doubted; patently evident or certain; unquestionable.
Origin of indubitable
1615-25; < Latin indubitābilis. See in-3, dubitable
Related forms
indubitability, indubitableness, noun
indubitably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for indubitable
  • The railroad track-layer is an indubitable and decided success.
  • Carriers must receive irrevocable financial guarantees of indubitable value and unquestionable right of recourse.
  • Partial transfer of collateral in full satisfaction of debt failed to give creditor indubitable equivalent of secured claim.
British Dictionary definitions for indubitable


incapable of being doubted; unquestionable
Derived Forms
indubitability, indubitableness, noun
Word Origin
C18: from Latin indubitābilis, from in-1 + dubitāre to doubt
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for indubitable

mid-15c., from Latin indubitabilis "that cannot be doubted," from in- "not, opposite of" (see in- (1)) + dubitabilis "doubtful," from dubitare "hesitate, doubt" (see doubt).

Online Etymology Dictionary, © 2010 Douglas Harper
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