Surveillance

/sərˈveɪləns/

Meaning & Definition

noun
the close observation of a person or group, especially for the purpose of criminal investigation or control.
The police conducted surveillance on the suspected criminal for several weeks.
monitoring of behavior, activities, or information for the purpose of influencing, managing, directing, or protecting.
The surveillance of public spaces has increased due to concerns about national security.
a system of observing and recording information, typically using technology.
The company installed surveillance cameras throughout the building to ensure safety.

Etymology

French 'surveiller' meaning 'to oversee'

Common Phrases and Expressions

under surveillance
being watched or monitored closely, often for security or investigative purposes.
surveillance state
a government that extensively monitors its citizens' activities.
video surveillance
the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

Related Words

monitor
to observe and check the progress or quality of something over a period of time.
observe
to watch carefully, especially to gain information.

Slang Meanings

hassle factor
With all this surveillance, the hassle factor for criminals is up.
Big Brother
If you feel like you're being watched everywhere, you might say it's a Big Brother situation.