surveillance

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

Definition of surveillance

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

Examples of surveillance in a Sentence

  1. government surveillance of suspected terrorists

  2. The bank robbery was recorded by surveillance video cameras.

Recent Examples of surveillance from the Web

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.

Origin and Etymology of 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


SURVEILLANCE Defined for English Language Learners

surveillance

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noun

Definition of surveillance for English Language Learners

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


Medical Dictionary

surveillance

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

Medical Definition of surveillance

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





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