（英文出典: http://en.wikipedia.org/wiki/Wi-Fi ）

英文解釈（下訳）（構文見極め）
Wi-Fi, also spelled Wifi or WiFi, is a popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves. Wi-Fi, also spelled Wifi or WiFi, は a popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves である。
The name is a contraction of "Wireless Fidelity", and was stated to be a play on the audiophile term Hi-Fi. この名称は "Wireless Fidelity" を縮めたものであり、the audiophile term Hi-Fi にかけた言葉遊びから発したと言われている。
The Wi-Fi Alliance defines Wi-Fi as any "wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards". The Wi-Fi Alliance は Wi-Fi を「the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards に準拠する、あらゆる "wireless local area network (WLAN) products」と定義している。
However, since most modern WLANs are based on these standards, the term "Wi-Fi" is used in general English as a synonym for "WLAN". ただ、現在のほとんどの WLAN もこの規格に準拠しているため、 "Wi-Fi" という用語は、一般に WLAN の同義語として使われる。
Only Wi-Fi products that complete Wi-Fi Alliance certification testing successfully may use the "Wi-Fi CERTIFIED" trademark. Only Wi-Fi products that complete Wi-Fi Alliance certification testing successfully のみが、"Wi-Fi CERTIFIED" という商標を使うことを許される。
Many devices can use Wi-Fi, e.g. personal computers, video-game consoles, smartphones, some digital cameras, and digital audio players. Wi-Fi は多くの種類の機器（personal computers, video-game consoles, smartphones, some digital cameras, and digital audio players　など）に応用できる。
These can connect to a network resource such as the Internet via a wireless network access point. これらの機器をネットワークリソース（インターネットなど）（a wireless network access point　を介して）に接続できる
Such an access point (or hotspot) has a range of about 20 meters (65 feet) indoors and a greater range outdoors. そのような access point (hotspot　とも言う) は、屋内では about 20 meters (65 feet) カバーし、屋外では a greater range をカバーする。
Hotspot coverage can comprise an area as small as a single room with walls that block radio waves, or as large as many square miles achieved by using multiple overlapping access points. Hotspot のカバー範囲は、an area as small as a single room with walls that block radio waves　であったり、as large as many square miles achieved by using multiple overlapping access points　であったりする。