The full form of CCTV is Closed Circuit Television. CCTV is a TV system where signals are transmitted and monitored primarily for video surveillance and security use cases. The cameras in a CCTV system are connected to the monitors through a private transmission system, which ensures that the footage is only viewed by authorized individuals. The system is used to track a particular area that requires constant monitoring and where there is not much attention and rarely someone who can maintain observation for the longest possible time. CCTV signals are not necessarily dispensed for security purposes but are tracked.

In summary, the full form of CCTV is Closed Circuit Television, and it is a TV system used primarily for video surveillance and security purposes.