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

GS Vice President Ally Kim, who leads 52g, said the team used Graphon to improve analysis of closed-circuit television recordings that monitor construction sites for safety compliance.

From The Wall Street Journal • May 14, 2026

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

From Los Angeles Times • Jun. 19, 2023

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 • Jun. 16, 2023

CBP said the closed-circuit television monitoring system was out of commission at the Border Patrol’s Harlingen station, one of the locations where she was held.

From Washington Times • Jun. 1, 2023

As moves were made on the board, they were simultaneously shown on forty closed-circuit television monitors, in all points of the stadium.

From "Endgame" by Frank Brady