closed-circuit Meaning in the Cambridge English Dictionary
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Meaning of “closed-circuit” in the English Dictionary

"closed-circuit" in American English

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closed-circuitadjective [not gradable]

involving a ​televisionsystem with ​cameras that ​operate within or around a ​building as a way to ​preventstealing or other ​illegalactivities
(Definition of closed-circuit from the Cambridge Academic Content Dictionary © Cambridge University Press)
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