surveillance

noun

Synonyms of surveillancenext
: close watch kept over someone or something (as by a detective)

Examples of surveillance in a Sentence

government surveillance of suspected terrorists The bank robbery was recorded by surveillance video cameras.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The department says the cases were detected during annual surveillance tests. Dejanay Booth-Singleton, CBS News, 7 Apr. 2026 Investigators were able to identify the men through the surveillance footage and photos of their vehicles taken by a witness, according to the affidavit. Caroline Zimmerman, Kansas City Star, 7 Apr. 2026 Anthropic, whose policies bar it from enabling fully autonomous weapons or domestic mass surveillance, resisted on these points, slowing negotiations for an overhauled deal. Ronan Farrow, New Yorker, 6 Apr. 2026 In a statement posted on X, the Israel Defense Forces (IDF) confirmed Khademi's killing, accusing him of helping advance terrorist attacks abroad and overseeing surveillance of Iranian civilians as part of the regime’s crackdown on domestic protests. Eric MacK, FOXNews.com, 6 Apr. 2026 See All Example Sentences for surveillance

Word History

Etymology

French, from surveiller to watch over, from sur- + veiller to watch, from Old French veillier, from Latin vigilare, from vigil watchful — more at vigil

First Known Use

1802, in the meaning defined above

Time Traveler
The first known use of surveillance was in 1802

Browse Nearby Words

Cite this Entry

“Surveillance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/surveillance. Accessed 7 Apr. 2026.

Kids Definition

surveillance

noun
sur·​veil·​lance sər-ˈvā-lən(t)s How to pronounce surveillance (audio)
also -ˈvāl-yən(t)s
or -ˈvā-ən(t)s
: close watch
under surveillance

Medical Definition

surveillance

noun
sur·​veil·​lance
sər-ˈvā-lən(t)s also -ˈvāl-yən(t)s or -ˈvā-ən(t)s
: close and continuous observation or testing
serological surveillance
see immune surveillance

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