/ Dictionary / Index I irrelevancy: Meaning and Definition of Find definitions for: ir•rel•e•van•cy Pronunciation: (i-rel'u-vun-sē), [key] — pl. -cies. irrelevance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irrelevancy (Thesaurus) irrelevance irrelevant 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