/ Dictionary / Index H hi-fi: Meaning and Definition of Find definitions for: hi-fi Pronunciation: (hī'fī'), [key] — n. See a phonograph, radio, or other sound-reproducing apparatus possessing high fidelity. —adj. of, pertaining to, or characteristic of such apparatus; high-fidelity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hi-fi (Thesaurus) hifalutin Higashiosaka Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language