surveillance

play
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.

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


First Known Use: 1802


SURVEILLANCE Defined for English Language Learners

surveillance

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

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

play play play
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




Seen and Heard

What made you want to look up surveillance? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to bend the knee

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • snowflake-closeup
  • Which is a synonym of imprecate?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ