Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.
a. the reproduction of sound using electronic equipment that gives faithful reproduction with little or no distortion
b. (as modifier): a high-fidelity amplifier
high fidelity[¦hī fi′del·əd·ē]
Audio reproduction that closely approximates the sound of the original performance. Also known as hi-fi.