/ Dictionary / Index I irreligion: Meaning and Definition of Find definitions for: ir•re•li•gion Pronunciation: (ir"i-lij'un), [key] — n. lack of religion. hostility or indifference to religion; impiety. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irreligion (Thesaurus) irrelievable irreligious Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language