[ih-ref-yuh-tuh-buhl, ir-i-fyoo-tuh-buhl]


not capable of being refuted or disproved: irrefutable logic.

Origin of irrefutable

1610–20; < Late Latin irrefūtābilis. See ir-2, refutable
Related formsir·ref·u·ta·bil·i·ty, ir·ref·u·ta·ble·ness, nounir·ref·u·ta·bly, adverb

Synonyms for irrefutable Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irrefutable

Contemporary Examples of irrefutable

Historical Examples of irrefutable

  • And that cannot be denied; the certificates are there, irrefutable.

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

    The Golden Woman

    Ridgwell Cullum

  • To this logic, which was irrefutable, poor Encisco could make no reply.

  • The thing existed in his mind, not as a picture, but as a piece of irrefutable evidence.

    Five Tales

    John Galsworthy

  • Such is the proof we look upon as irrefutable, as complete and perfect.


    Th. Pascal

British Dictionary definitions for irrefutable



impossible to deny or disprove; incontrovertible
Derived Formsirrefutability or irrefutableness, nounirrefutably, 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

Word Origin and History for irrefutable

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