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Surveillance

/səˈveɪləns/

Watching or monitoring people or places, often for security purposes.

Synonyms:

"I am under surveillance, I see."

The surveillance cameras monitor the shopping mall 24/7.

During the protest, police used drones for surveillance.

From French surveillance, from surveiller (to watch over), from sur- (over) + veiller (to watch), dating back to the 15th century.

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