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[wahy-fahy] /ˈwaɪˌfaɪ/
Computers, Trademark.
a brand name certifying that a device or other product is compatible with a set of broadband wireless networking standards. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for Wi-Fi


(computing) a system of accessing the internet from remote machines such as laptop computers that have wireless connections
Word Origin
C20: from wi(reless) fi(delity)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Wi-Fi



1999, apparentlly from wireless; the second element perhaps suggested by hi-fi.

Online Etymology Dictionary, © 2010 Douglas Harper
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Wi-Fi in Technology

Either of two different incompatible radio-based LAN protocols, namely 802.11b (which speaks DSSS at 2.4GHz) and 802.11a (which speaks OFDM at 5GHz).
The term was invented by the marketing departments of wi-fi equipment manufacturers. It is, notionally, short for "wireless fidelity", on the analogy of hi-fi for "high fidelity" audio.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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