| Noun | 1. | hi-fi - equipment for the reproduction of sound with high fidelity Synonyms: high fidelity sound system |
| 2. | hi-fi - the reproduction of sound with little or no distortion Synonyms: high fidelity | |
| Adj. | 1. | hi-fi - characterized by minimal distortion in sound reproduction; "a high-fidelity recording"; "a hi-fi system" Synonyms: high-fidelity |