/ Dictionary / Index R radio direction finder: Meaning and Definition of Find definitions for: ra'dio direc'tion find"er Pronunciation: [key] a navigational aid establishing a fix by means of the bearings of two known radio stations. Abbr.: RDF Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. radiodiagnosis radioelement Related Content Daily Word Quiz: abscond Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language