/ Dictionary / Index R radioman: Meaning and Definition of Find definitions for: ra•di•o•man Pronunciation: (rā'dē-ō-man"), [key] — pl. -men. a person who operates a radio. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiolysis radiometer Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language