surveillance

 

surveillance

noun

close observation, especially of a suspected spy or criminal.

observation scrutiny watch view inspection monitoring supervision superintendence spying espionage intelligence undercover work infiltration reconnaissance bugging wiretapping phone tapping recon

Surveillance is the careful watching of someone, especially by an organization such as the police or the army.

He was arrested after being kept under constant surveillance.

Police swooped on the home after a two-week surveillance operation.

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