sur
vei
llance
1
the act of monitoring a person or place, especially by the police
- The police increased surveillance in the neighborhood after a series of burglaries.
- Surveillance footage from the security cameras helped solve the case.
- The suspect was placed under 24-hour surveillance to track his movements.
- Government agencies use drones for aerial surveillance of remote areas.
- The team set up surveillance at the suspect's home to gather evidence.