nightwatch
nounUK /ˈnaɪt.wɒtʃ/
US /ˈnaɪt.wɑːtʃ/
A nightwatch is a person who stays awake at night to keep a place safe.
The nightwatch walked around the castle while everyone else slept.
OTHER MEANINGS
2. The time period during which a guard stays awake at night.
He took the nightwatch from midnight until dawn.
3. A group of people who keep watch during the night.
The nightwatch gathered at the gate before starting their rounds.
4. In some stories, a special guard who protects a place after dark.
The museum's nightwatch knew every hallway by heart.