- The definition of CCTV refers to closed-circuit television, or the use of video cameras to transmit images to a specific limited number of televisions on the same network or circuit.
When a security system allows you to monitor what is going on in a home on a monitor on your desk, this is an example of CCTV.
CCTV definition by Webster's New World
CCTV definition by American Heritage Dictionary
cctv - Computer Definition
A private television system involving one or more cameras connected to one or more monitors for security, surveillance, law enforcement, and general purpose monitoring applications. Unlike public broadcast TV, CCTV is a closed system in intended for private use.
(Closed Circuit TV) A surveillance system that comprises cameras, recorders and displays for monitoring activities in a store or company. Earlier CCTV systems used a single VHS tape machine for each camera, specialized "quad" VCRs that recorded four low-resolution images or time-lapse recorders that handled multiple cameras. Although analog cameras are still widely used, the VHS tape machines have given way to digital video recorders (DVRs) with multiple composite video inputs. The DVR and NVR Increasingly, digital "network cameras" are used in CCTV that transmit over an Ethernet network. Offering higher resolution, the network camera also provides greater installation flexibility. For more details, see network camera.