In New York, police officers stood sentry outside many mosques.
Today, sheriff's deputies stand sentry a few feet from his hospital bed.
But she was standing sentry, supposed to answer any hails.
The other guard brings in a chair for their prisoner, and then the two stand sentry inside the door.
The boss guard ordered two of his people to walk into the woods to stand sentry, and that's where things went wrong.
The captain of the guard was standing sentry at the main gate, as he did once every moon.
While digging, one member of the squad was to stand sentry.
Young Georgia soldiers had stood sentry around the magazines.
The soldier was standing sentry next to the body.
He turned to the soldier who had been standing sentry before the tent.
Idiomy