/ Dictionary / Index I irrefutable: Meaning and Definition of Find definitions for: ir•ref•u•ta•ble Pronunciation: (i-ref'yu-tu-bul, ir"i-fy'tu-bul), [key] — adj. that cannot be refuted or disproved: irrefutable logic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irrefutable (Thesaurus) irrefrangible irreg. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language