/ Dictionary / Index I irrelevant: Meaning and Definition of Find definitions for: ir•rel•e•vant Pronunciation: (i-rel'u-vunt), [key] — adj. not relevant; not applicable or pertinent: His lectures often stray to interesting but irrelevant subjects. (of evidence) having no probative value upon any issue in the case. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irrelevant (Thesaurus) irrelevancy irrelievable 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