/ Dictionary / Index M medium frequency: Meaning and Definition of Find definitions for: me'dium fre'quency Pronunciation: [key] any frequency between 300 and 3000 kilohertz. Abbr.: MF Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. medium bomber mediumistic Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language