/ Dictionary / Index I irritable: Meaning and Definition of Find definitions for: ir•ri•ta•ble Pronunciation: (ir'i-tu-bul), [key] — adj. easily irritated or annoyed; readily excited to impatience or anger. displaying irritability. susceptible to physical irritation. abnormally sensitive to a stimulus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irritable (Thesaurus) irritability irritable bowel syndrome Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language