/ Dictionary / Index F FM: Meaning and Definition of Find definitions for: FM Pronunciation: [key] frequency modulation: a method of impressing a signal on a radio carrier wave by varying the frequency of the carrier wave. a system of radio broadcasting by means of frequency modulation. of, pertaining to, or utilizing such a system. Cf. AM. Fm Pronunciation: [key] — Symbol, Chem. fermium. fm Pronunciation: [key] — Symbol, Physics. femtometer. fm. Pronunciation: [key] fathom. from. f.m. Pronunciation: [key] (in prescriptions) make a mixture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fm (Thesaurus) flywheel FMB 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