This defines a technology that can provide network / Internet access through invisible radio frequency (spectrum) signals.
Full Details:
http://www.ispreview.co.uk/broadband_wireless.php
Related Articles:
> 3G - Third Generation
> 4G - Fourth Generation
> WiMAX - 802.16
> Wi-Fi - Wireless Fidelity - 802.11
> WLAN - Wireless Local Area Network
> UWB - Ultrawideband