HI-FI Meaning of HI-FI in English transcription, транскрипция: [ ˈhaɪˈfaɪ ]adj. & n. colloq. --adj. = high fidelity. --n. (pl. hi-fis) a set of equipment for high-fidelity sound reproduction. [abbr.] English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012