Dictionary.com
Thesaurus.com
Synonyms

irrefutable

American  
[ih-ref-yuh-tuh-buhl, ir-i-fyoo-tuh-buhl] / ɪˈrɛf yə tə bəl, ˌɪr ɪˈfyu tə bəl /

adjective

  1. not capable of being refuted or disproved.

    irrefutable logic.

    Synonyms:
    undeniable, incontrovertible, indisputable

irrefutable British  
/ ˌɪrɪˈfjuːtəbəl, ɪˈrɛfjʊtəbəl /

adjective

  1. impossible to deny or disprove; incontrovertible

"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

Other Word Forms

  • irrefutability noun
  • irrefutableness noun
  • irrefutably adverb

Etymology

Origin of irrefutable

1610–20; < Late Latin irrefūtābilis. See ir- 2, refutable ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It was, at last, irrefutable proof that Charli knows best.

From Salon • Feb. 8, 2026

What is irrefutable is the Rams are continually deepening their foothold on the Los Angeles market.

From Los Angeles Times • Nov. 24, 2025

In the second Test in Adelaide came irrefutable evidence the Johnson juggernaut would not be stopped.

From BBC • Nov. 4, 2025

The pressing relevance of the artist’s work for our present fraught era is irrefutable — not least when the dizzying transformation from analog to digital culture is harnessed to productive ends.

From Los Angeles Times • Sep. 22, 2025

The evidence from the Cavendish, the Carnegie Institute, and Caltech had to be judged irrefutable.

From "Big Science" by Michael Hiltzik