from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Impossible to refute or controvert; indisputable: irrefragable evidence.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Which cannot be refuted; indisputable, clearly right, incontrovertible.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not refragable; not to be gainsaid or denied; not to be refuted or overthrown; irrefutable; unanswerable; incontestable; undeniable

from The Century Dictionary and Cyclopedia

  • Not refragable; incapable of being broken down or refuted; incontrovertible; undeniable; not confutable: as, an irrefragable argument; irrefragable evidence; an irrefragable opponent.
  • Synonyms Unanswerable, indisputable, unquestionable, indubitable, irrefutable.


from The American Heritage® Dictionary of the English Language, 4th Edition

Late Latin irrefrāgābilis : Latin in-, not; see in-1 + Latin refrāgārī, to oppose, resist; see bhreg- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

16th century. From Latin irrefrāgābilis, from refrāgor ("oppose, contest").


  • By proofs exactly of the same linguistic kind as those by which the modern Spanish, French, and other Latin dialects can be shown to have all radiated from Rome as their centre, the old traditions of the eastern origin of all the chief nations of Europe have been proved to be fundamentally true; for by evidence so "irrefragable" (to use the expression of the Taylorian professor of modern languages at Oxford), that "not an English jury could now-a-days reject it," Philological Archæology has shown that of the three great families of mankind -- the Semitic, the Turanian, and the

    Archaeological Essays, Vol. 1

  • Responding to the concern that the courts had placed too rigid a test on whistleblowers -- a key precedent demands that an employee have access to "irrefragable proof" before being eligible for protection -- the 111th Congress revised the act so that the test is "whether a disinterested observer with knowledge of the essential facts" could conclude with the whistleblower that the alleged violations were made.

    Feisal G. Mohamed: "See Something, Say Something" And Impunity for Profiling

  • ` The fact, man, the irrefragable fact! 'of Ernest's was ringing in my consciousness.

    Chapter 4: Slaves of the Machine

  • Confine yourself to the Fact, man, to the irrefragable Fact.

    The Kempton-Wace Letters

  • He was an earth-man in his devotion to the irrefragable fact, and his logic was admirable though frosty.

    Chapter 14

  • ` The fact, man, the irrefragable fact! 'he would proclaim triumphantly, when he had brought one of them a cropper.

    Chapter 1: My Eagle

  • I only knew love, the divine and irrefragable fact, that is all.


  • Barleycorn sends his White Logic, the argent messenger of truth beyond truth, the antithesis of life, cruel and bleak as interstellar space, pulseless and frozen as absolute zero, dazzling with the frost of irrefragable logic and unforgettable fact.

    Chapter 35

  • But -- and the everlasting, irrefragable fact remains: HER FEET ARE BEAUTIFUL, HER EYES ARE

    Chapter 21

  • This cannot be gainsaid since it is proven by irrefragable testimony, and it has been demonstrated that after witches in the form of cats have been seen to attack children, blood is noticed to trickle and trill from wounds, although they may be very small, and accordingly the Devil hath been busy here.

    Overheard at WisCon


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  • "In September I planted a line of spruce saplings along the west portico, against the better judgment of Rodgers—and now they have all but one of them died, which I view as final and irrefragable evidence that I have entered my senescence."

    A Death in the Small Hours by Charles Finch, pp 274-275

    January 17, 2014

  • I fragged you! No take-backs!

    December 22, 2009

  • "This organization, which is as clear and universal as if it were indeed the expression of an irrefragable law, has at its central pole, pain instead of pleasure. The pain of sexual frustration, of repressed tenderness, of denied curiosity, of isolation in the ego, of greed, suppressed rebellion, of hatred poisoning all love and generosity, permeates our sexuality. What we love we destroy. Censorship is the outward and continuing expression of this distortion of the human erotic faculty."

    - 'The Wet Dream Film Festival', Germaine Greer in Suck, 1971.

    April 2, 2008

  • "'I assert nothing, Jack, but the lady's reputation is very far from being perfect, as I know from another source, and I strongly advise you to take no decided step until you have some irrefragable independent evidence of her state — until you have really sifted the matter.'" -- Patrick O'Brian, The Surgeon's Mate, 168

    February 7, 2008