guard; security guard; security officer
Refers to a person employed to protect property, maintain safety, or monitor premises. Commonly seen at buildings, events, and in uniformed roles.
A security guard is standing in front of the bank.
Many security guards were stationed at the event venue.
They stationed security guards at the entrance of the event venue.
At night, the security guard patrols the grounds.
When I was a university student, I worked as a security guard.
I was stopped by a security guard because I was acting suspiciously.