/ Dictionary / Index R radio beacon: Meaning and Definition of Find definitions for: ra'dio bea"con Pronunciation: [key] a radio station that sends a characteristic signal so as to enable ships or airplanes to determine their position or bearing by means of a radio compass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radioautography radio beam Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language