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Wi-Fi

American

[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.

Wi-Fi British

/ ˈwaɪˌfaɪ /

noun

computing a system of accessing the internet from remote machines such as laptop computers that have wireless connections

"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

Etymology

Origin of Wi-Fi

First recorded in 1995–2000; wi(reless)-fi(delity), patterned after hi-fi

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Wi-Fi

In most countries, a Wi-Fi connection is required.

From MarketWatch ● Oct. 16, 2026

When connected to Wi-Fi, you can make unlimited voice or video calls, send texts, plus share photos, videos and large files to anyone with an active WhatsApp account.

From MarketWatch ● Oct. 16, 2026

Weak passwords, outdated software and poor Wi-Fi security can leave your home cameras exposed.

From The Wall Street Journal ● Oct. 11, 2026

American Airlines plans to install Starlink Wi-Fi service on all of its 1,000 mainline jets, up from the 500 it announced earlier this year.

From The Wall Street Journal ● Oct. 9, 2026

This Harlem free Wi-Fi was sooo slow for downloads.

From "The Stars Beneath Our Feet" by David Barclay Moore

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023