/ Dictionary / Index R retrogressive: Meaning and Definition of Find definitions for: ret•ro•gres•sive Pronunciation: (re"tru-gres'iv), [key] — adj. characterized by retrogression; degenerating. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: retrogressive (Thesaurus) retrogression retrolental Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language