Definition of broadband

Of or relating to communications systems in which the medium of transmission (such as a wire or fiber-optic cable) carries multiple messages at a time, each message modulated on its own carrier frequency by a modem.

A transmission medium designed for high-speed data transfers over long distances. Cable modem services and Digital Subscriber Line (DSL) are examples of broadband networks.

Internet access over a connection much faster than an ordinary modem, such as- ADSL- or cable.