surveillance
noun /sɜːˈveɪləns/
/sɜːrˈveɪləns/
[uncountable]- the act of carefully watching a person suspected of a crime or a place where a crime may be committed synonym observation
- The police are keeping the suspects under constant surveillance.
- surveillance cameras/equipment
Extra ExamplesTopics War and conflictc1, Crime and punishmentc1- The suspects are under police surveillance.
- The images were covertly captured on surveillance tape.
Oxford Collocations Dictionaryadjective- close
- constant
- regular
- …
- be under
- keep somebody/something under
- place somebody/something under
- …
- camera
- device
- equipment
- …
Word Originearly 19th cent.: from French, from sur- ‘over’ + veiller ‘watch’ (from Latin vigilare ‘keep watch’).