hi-fi

[hahy-fahy]
noun
2.
a phonograph, radio, or other sound-reproducing apparatus possessing high fidelity.
adjective
3.
of, pertaining to, or characteristic of such apparatus; high-fidelity.

Origin:
1945–50, Americanism; shortened form of high fidelity

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
hi-fi (ˈhaɪˈfaɪ)
 
n
1.  a.  short for high fidelity
 b.  (as modifier): hi-fi equipment
2.  a set of high-quality sound-reproducing equipment

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

hi-fi
1950, abbreviation of high fidelity (1934).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
hi-fi
high fidelity
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for hifi
It is often used by hifi reviewers as a reference turntable.
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