/ Dictionary / Index S superhigh frequency: Meaning and Definition of Find definitions for: su'per•high fre'quency Pronunciation: (s'pur-hī"), [key] — Radio. Radio. any frequency between 3000 and 30,000 megahertz. Abbr.: SHF Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. superheterodyne superhighway Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language