/ Dictionary / Index I Irishism: Meaning and Definition of Find definitions for: I•rish•ism Pronunciation: (ī'ri-shiz"um), [key] — n. a custom, manner, practice, idiom, etc., characteristic of the Irish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Irish Gaelic Irishize Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language