Word Study
hi-fi
CIDE DICTIONARY
hi-fi, n. [shortening of high fidelity.].
An electronic device that plays phonograph records, reproducing the original sound with a high degree of fidelity. It superseded the older phonographs, and itself is being displaced in popularity by CD players. [WordNet 1.5]
OXFORD DICTIONARY
hi-fi, adj. & n. colloq.
--adj. = high fidelity.
--n. (pl. hi-fis) a set of equipment for high-fidelity sound reproduction.
--adj. = high fidelity.
--n. (pl. hi-fis) a set of equipment for high-fidelity sound reproduction.
Etymology
abbr.
For further exploring for "hi-fi" in Webster Dictionary Online