/ Dictionary / Index R rapid transit: Meaning and Definition of Find definitions for: rap'id tran'sit Pronunciation: [key] a system of public transportation in a metropolitan area, usually a subway or elevated train system. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rapido rapier Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language