/ Dictionary / Index H high fidelity: Meaning and Definition of Find definitions for: high' fidel'ity Pronunciation: [key] — Electronics. Electronics. sound reproduction over the full range of audible frequencies with very little distortion of the original signal. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. high fashion high finance, Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language