More from Oxford Dictionaries. OxfordDictionaries.com ; OxfordWords blog ; Oxford Dictionaries Spanish ; Oxford Global Languages ; Oxford Dictionaries Premium
WiFi is the nickname for Wireless Fidelity - high speed internet and network connection without the use of wires, cables and other stuff you can trip over.
Light Fidelity (Li-Fi) is a bidirectional, high-speed and fully networked wireless communication technology similar to Wi-Fi.