Pronunciation: /sərˈveɪləns/
noun the act of observing or monitoring someone or something for a specific purpose, such as security or supervision
A1 The security guard used surveillance cameras to monitor the entrance.
A2 The government installed surveillance cameras in public places to improve safety.
B1 The company implemented surveillance measures to prevent theft in the workplace.
B2 The police used advanced surveillance technology to track down the suspect.
C1 The intelligence agency conducted covert surveillance operations to gather information.
C2 The surveillance footage provided crucial evidence in the investigation.
formal The government implemented surveillance measures to monitor potential security threats.
informal I always feel like someone is watching me with all this surveillance around.
slang Dude, the surveillance at that party was intense - I couldn't even sneak in a drink!
figurative Her constant surveillance of her colleagues' actions earned her the nickname 'Big Sister'.
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