n regular television; cable. Any television that doesn’t come from a satellite. Until recently there was no cable TV in the U.K., so any terrestrial television was beamed over radio waves and received by an aerial. The distinction is a bit hazy these days as the Brits are now fortunate enough to have cable TV. Nowadays, terrestrial television generally refers to the five channels (BBC1, BBC2, ITV, Channel Four and Channel Five) which are transmitted via radio.