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surveillant

American  
[ser-vey-luhnt, -veyl-yuhnt] / sərˈveɪ lənt, -ˈveɪl yənt /

adjective

  1. exercising surveillance.

noun

  1. a person who exercises surveillance.

Etymology

Origin of surveillant

1810–20; < French, present participle of surveiller ( surveillance, -ant )

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.