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[ih-ref-yuh-tuh-buh l, ir-i-fyoo-tuh-buh l] /ɪˈrɛf yə tə bəl, ˌɪr ɪˈfyu tə bəl/
that cannot be refuted or disproved:
irrefutable logic.
Origin of irrefutable
1610-20; < Late Latin irrefūtābilis. See ir-2, refutable
Related forms
irrefutability, irrefutableness, noun
irrefutably, adverb
indisputable, incontrovertible, undeniable. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for irrefutably
Contemporary Examples
Historical Examples
  • Fortunately, however, I have at my disposal a wealth of documentary material which irrefutably confirms the truth of my words.

    The Last Days of Tolstoy V. G. Chertkov
  • The logic of the thing was spread out plainly and irrefutably in his mind.

    A Great Man Arnold Bennett
  • Every individual identified, is identified plainly, irrefutably.

    Messengers of Evil Pierre Souvestre
  • Such facts as these irrefutably differentiate the two kinds of tuberculosis.

  • But the portrait was, irrefutably, nearing completion, and it was to be exhibited the twentieth of the month.

    Miss Billy's Decision Eleanor H. Porter
British Dictionary definitions for irrefutably


/ɪˈrɛfjʊtəbəl; ˌɪrɪˈfjuːtəbəl/
impossible to deny or disprove; incontrovertible
Derived Forms
irrefutability, irrefutableness, noun
irrefutably, adverb
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
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Word Origin and History for irrefutably



1610s, from Latin irrefutabilis "irrefutable," from assimilated form of in- "not, opposite of" (see in- (1)) + refutabilis, from refutare (see refute). Related: Irrefutably; irrefutability.

Online Etymology Dictionary, © 2010 Douglas Harper
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