surveillance
noun/sərˈveɪləns/
Frequency rank: #3,377 of 20,003 in the WORDED list (wordfreq data)
Meaning
Close watching of a person or place, especially to prevent crime.

Example sentence
The security cameras are part of the building's surveillance system used to monitor activity.
Synonyms & related words
- monitoring
- observation
- watch
- oversight
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