keep under surveillance
idiom
: to watch (someone or something) closely especially in order to prevent or detect a crime
The police kept her/the building under surveillance.
Cite this Entry
“Keep under surveillance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%20under%20surveillance. Accessed 28 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share