/ Dictionary / Index R retroactive: Meaning and Definition of Find definitions for: ret•ro•ac•tive Pronunciation: (re"trō-ak'tiv), [key] — adj. operative with respect to past occurrences, as a statute; retrospective: a retroactive law. pertaining to a pay raise effective as of a past date. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: retroactive (Thesaurus) retroaction retrobulbar Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language