surveillance

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

Definition of surveillance

: close watch kept over someone or something (as by a detective) also : supervision

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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

The San Mateo County Sheriff’s Office said detectives with its Crime Suppression Unit conducted surveillance on 44-year-old Rudy Obdulio Rivera and 42-year-old Mercy Folgers Sandoval for two months after receiving a tip about the ring. Jason Green, The Mercury News, "Authorities bust Bay Area-wide retail theft ring," 22 Aug. 2019 Police said detectives recently discovered video surveillance of Lai at a restaurant in the 300 block of West Magnolia Avenue in Auburn on Sunday. Carol Robinson | Crobinson@al.com, al, "Search continues for missing Auburn University grad student last seen on restaurant video," 22 Aug. 2019 And the app isn't intended for mass surveillance, but, at least at first, as a tool for clinicians. Kelly Servick, Science | AAAS, "Suicide attempts are hard to anticipate. A study that tracks teens’ cellphone use aims to change that," 21 Aug. 2019 Airships are enjoying a bit of a revival, as manufacturers develop helium blimps for surveillance, luxury travel and shipping. NBC News, "Zeppelins stopped flying after the Hindenburg disaster. Now scientists want to bring them back.," 19 Aug. 2019 James Williams was fired from his job in 2016, nearly a year after using a surveillance program to report that Erious Johnson Jr., the department’s director of civil rights, was using the Black Lives Matter hashtag on Twitter. oregonlive.com, "Investigator who used cybersurveillance on state civil rights director files whistleblower suit," 14 Aug. 2019 Detectives were notified and are working with USPS officials to obtain video surveillance of the suspect. Houston Chronicle, "Memorial Villages Police Department weekly report," 12 Aug. 2019 Climo tried to recruit a homeless man's assistance in the surveillance of both places, the complaint says. Jay Croft And Madeline Holcombe, CNN, "A Las Vegas security guard plotted attacks on a synagogue and an LGBTQ bar, the FBI says," 10 Aug. 2019 Jay-Z faced stringent criticism from longtime activists who urged him to consider that the company would expand state surveillance of those who encounter the criminal justice system. Hannah Giorgis, The Atlantic, "Free Meek and the Tricky Role of Celebrity Activism," 9 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'surveillance.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of surveillance

1802, in the meaning defined above

History and Etymology for surveillance

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

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More Definitions for surveillance

surveillance

noun

English Language Learners Definition of surveillance

: the act of carefully watching someone or something especially in order to prevent or detect a crime

surveillance

noun
sur·​veil·​lance | \ sər-ˈvā-lən(t)s also -ˈvāl-yən(t)s or -ˈvā-ən(t)s\

Medical Definition of surveillance

: close and continuous observation or testing serological surveillance — see immunological surveillance

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