Definition of wifi

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Trademark of the Wi-Fi Alliance that is used to brand certified products that belong to a class of wireless local area network (WLAN) devices based on the IEEE 802.11 standards; by far the most widespread WLAN class today. Because of the close relationship with its underlying standard, the term Wi-Fi is often used as a synonym for IEEE 802.11 technology. See ~ http://en.wikipedia.org/wiki/Wifi