/ Dictionary / Index R radio star: Meaning and Definition of Find definitions for: ra'dio star" Pronunciation: [key] — Astron. Now Rare. Astron. Now Rare. a radio source. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radio spectrum radio station Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language