Broadband A high-speed, high-capacity transmission medium that can carry signals from multiple independent network carriers. This is done on a single coaxial or fiber-optic cable by establishing different bandwidth channels. Broadband technology can support a wide range of frequencies. It is used to transmit data, voice and video over long distances simultaneously. Investopedia Says: Broadband internet access is much faster than dial-up access. It is similar to the difference between a brand new sports car and a horse-drawn carriage. Related Terms: Asymmetric Digital Subscriber Line - ADSL Bandwidth Internet Service Provider - ISP Very Small Aperture Terminal - VSAT |