Wi-Fi (pronounced wye-fye, and rhymes with Hi-Fi) is a wireless technology brand owned by the Wi-Fi Alliance. The term Wi-Fi has become synonymous with Wireless Ethernet (IEEE 802.11); however, this is technically incorrect because Wi-Fi is a brand name and not a generic technology name.

The term Wi-Fi has alternative spellings of WiFi, Wi-fi, Wifi, or wifi.

See also: IEEE 802.11, Wi-Fi Alliance, Wireless Ethernet