- A TV transmission system which is not intended for public reception. In this system, one or more cameras are in a closed circuit with one or more TV receivers, which are the only ones that can receive the transmitted signals. Used, for instance, for surveillance of a location. Its abbreviation is CCTV. Also called closed-circuit TV system.
- synonymclosed-circuit television
- noun a system where a TV picture is transmitted from a camera to receivers within a closed circuit. It is used e.g. for surveillance in factories, shops and banks, and for showing pictures of events to people who are not able to attend the event themselves.