surveillance
US /sɚˈveɪ.ləns/
UK /sɚˈveɪ.ləns/

1.
bewaking, toezicht
close observation, especially of a suspected spy or criminal
:
•
The police kept the suspect under constant surveillance.
De politie hield de verdachte onder constante bewaking.
•
CCTV cameras are used for public surveillance.
CCTV-camera's worden gebruikt voor openbare bewaking.