BROADBAND
broadband, wideband
(adjective) responding to or operating at a wide band of frequencies; “a broadband antenna”
broadband
(adjective) of or relating to or being a communications network in which the bandwidth can be divided and shared by multiple simultaneous signals (as for voice or data or video)
Source: WordNet® 3.1
Etymology
Adjective
broadband (not comparable)
(telecommunications) Of, pertaining to, or carrying a wide band of electromagnetic frequencies
Noun
broadband (usually uncountable, plural broadbands)
(telecommunications) A wide band of electromagnetic frequencies
(Internet) An internet connection provisioned over an existing service using alternate signal frequencies such as ADSL or cable modem.
Source: Wiktionary