From Longman Dictionary of Contemporary Englishhi-fihi-fi /ˈhaɪ faɪ, ˌhaɪ ˈfaɪ/ noun (plural hi-fis) [countable] old-fashioned APMTCRa piece of high-quality electronic equipment for playing recorded music SYN stereo —hi-fi adjective hi-fi speakers
Examples from the Corpus
hi-fi• It is absolutely vital to the sales of a popular car, a hi-fi radio, a camera or an evening dress.• Peter sounds off I first became interested in car hi-fi about five years ago.• And one for the road, the last word in car hi-fi.• This was to be the turning point for me in terms of Car hi-fi.• If company cars, company fitted-kitchens or company hi-fi seem to do the trick, sad but fine.• In the living-room, a smoked glass hi-fi dominated the mahogany wall unit, huge speakers beside it.• His family have bought him a new hi-fi for Christmas.• Many students arrive at college with a new hi-fi, camera, radio, etc., which are cherished possessions.Origin hi-fi (1900-2000) high fidelity 