/ Dictionary / Index R retro: Meaning and Definition of Find definitions for: ret•ro Pronunciation: (re'trō), [key] — adj. Informal. retroactive: retro pay. of or designating the style of an earlier time: retro clothes. retro- Pronunciation: [key] a prefix occurring in loanwords from Latin meaning “backward” (retrogress); on this model, used in the formation of compound words (retrorocket). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: retro (Thesaurus) retriever retroact Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language