closed-cir·cuit tel·e·vi·sion
noun/ˌkləʊzd ˌsɜːkɪt ˈtelɪvɪʒn/
/ˌkləʊzd ˌsɜːrkɪt ˈtelɪvɪʒn/
[uncountable] (abbreviation CCTV)
- a television system that works within a limited area, for example a public building, especially to protect it from crime
闭路电视 Oxford Collocations DictionaryClosed-circuit television is used before these nouns:- surveillance