/ Dictionary / Index H high frequency: Meaning and Definition of Find definitions for: high' fre'quency Pronunciation: [key] the range of frequencies in the radio spectrum between 3 and 30 megahertz. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. highflying high fulham Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language