The term "Wi-Fi" originated in 1999 as a brand name created by the consulting firm Interbrand for the Wi-Fi Alliance, the consortium that certifies wireless networking products. It was designed as a catchy, consumer-friendly name for the technical standard IEEE 802.11. While often assumed to be an abbreviation for "Wireless Fidelity," this is a retroactive explanation; the name was primarily a pun on the well-established term "Hi-Fi" (High Fidelity) from the audio industry, implying a comparable standard of quality for wireless data transmission. Its rapid adoption into common English vocabulary reflects the technology's pervasive integration into daily life, transforming from a specific trademark into a generic term for wireless networking itself.

The term is a modern commercial coinage, not derived from classical morphemes. It is a playful, pseudo-scientific alteration of "Hi-Fi" (High Fidelity), replacing "Hi" with "Wi" to suggest "Wireless Fidelity."