stakeout
/ˈsteɪkoʊt/Definitions
1. noun
a period of surveillance, typically of a person or location, often with the intention of gathering information or evidence.
“The detective conducted a stakeout of the suspect’s house for several days.”
2. verb
to keep under surveillance, especially by following someone or watching a location.
“The police officers staked out the warehouse where the robbery was suspected to have taken place.”