/ Dictionary / Index I Irish Sea: Meaning and Definition of Find definitions for: I'rish Sea' Pronunciation: [key] a part of the Atlantic between Ireland and England. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Irish Republican Army Irish setter 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