closed-circuit television

noun

1. a system of televising by cable to designated viewing sets, as within a factory for monitoring production operations, in a theater for viewing a special event taking place elsewhere, or in an office building as an aid to maintaining security.

closed-circuit television

noun

1. a television system in which signals are transmitted from a television camera to the receivers by cables or telephone links forming a closed circuit, as used in security systems, etc

Word History and Origins

Origin of closed-circuit television¹

First recorded in 1945–50

Example Sentences

It triangulates the sound and, similar to a red-light camera, uses closed-circuit television to automatically take a picture of the license and fine the driver.

From Quartz

Metro uses closed-circuit television for several safety purposes, such as monitoring platform conditions.

From Washington Post

The Washington Metrorail Safety Commission had asked Metro to give safety inspectors access to closed-circuit television or surveillance video footage for “at least several months,” but Metro has declined, commission spokesman Max Smith said.

From Washington Post

There were no closed-circuit television cameras operating in the area near the blast.

From The Daily Beast

I'll probably stick to electric-eye doors, burglar alarms, closed-circuit television systems and things like that.

From Project Gutenberg