/ Dictionary / Index R radio shack: Meaning and Definition of Find definitions for: ra'dio shack" Pronunciation: [key] — Informal. Informal. a room or structure, as on a ship, for housing radio equipment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiosensitizer radiosodium Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language