SURVEILLANCE


Meaning of SURVEILLANCE in English

/ sɜːˈveɪləns; NAmE sɜːrˈv-/ noun

[ U ] the act of carefully watching a person suspected of a crime or a place where a crime may be committed

SYN observation :

The police are keeping the suspects under constant surveillance .

surveillance cameras / equipment

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WORD ORIGIN

early 19th cent.: from French , from sur- over + veiller watch (from Latin vigilare keep watch).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.