Describing frequency range. Also called broadband.
1: Regarding RF: Wireless microphones and IEMs usually operate in the UHF range. A system that covers the major part of this range (i.e., 470 MHz – 694 MHz) is said to be a wideband system, meaning, you only need one system to cover all available frequencies. This contrasts with narrower systems, where several systems are needed to cover the same frequency range.
2: In telecommunications, a medium that has a wide band of frequencies that enables simultaneous transmission of multiple signals and data types, such as audio, video and data.