closed-circuit television

American  

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 British  

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

---

Etymology

Origin of closed-circuit television

First recorded in 1945–50

Example Sentences

Mason said authorities were reviewing closed-circuit television video.

From Los Angeles Times

That material includes 1.3 million pages of unclassified documents, 5,500 pages of classified documents and 60 terabytes of closed-circuit television footage, she said.

From BBC

On Feb. 9, the Met said they believed Ezedi had probably “gone into the water” after piecing together closed-circuit television footage of his movements after the attack.

From Seattle Times

“On a closed-circuit television, rock bottom can look like sitting on a couch.”

From Los Angeles Times

The day was disrupted by three separate red-flag stoppages over two sessions, and the first session was wrecked by a technical problem with the track closed-circuit television system, which is part of F1's safety apparatus.

From BBC