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closed-circuit television

noun [U]
 
 
/ˌkləʊzd.sɜː.kɪtˈtel.ɪ.vɪʒ.ən/ US  /ˌkloʊzd.sɝːkɪtˈtel.ə-/ (abbreviation CCTV)

Definition

a system that sends television signals to a limited number of screens and is often used in shops as protection against thievesTelevision
(Definition of closed-circuit television noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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