/ Dictionary / Index R regrettable: Meaning and Definition of Find definitions for: re•gret•ta•ble Pronunciation: (ri-gret'u-bul), [key] — adj. causing or deserving regret; unfortunate; deplorable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: regrettable (Thesaurus) regretful regroup Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language