CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but ar… CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but ar… CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes. CCTVrelies on strategic placement of cameras, and observation of the camera’s input on monitors somewhere. show more