/ Dictionary / Index R Rapid City: Meaning and Definition of Find definitions for: Rap'id Cit'y Pronunciation: [key] a city in SW South Dakota. 46,492. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rapidan Rapid Deployment Force 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