A building used to house a guard or guards, typically at the entrance to a military base or other secure area. The soldiers reported to the guardhouse at the start of their shift.
A small building or structure where a guard is stationed, often at the entrance of a property or facility. The security guard waved us through after checking our IDs at the guardhouse.
A place of confinement for military personnel under arrest; a military jail. The sergeant threatened to throw the drunken private into the guardhouse.