Definitions for guardhouseˈgɑrdˌhaʊs; -ˌhaʊ zɪz
Random House Webster's College Dictionary
guard•houseˈgɑrdˌhaʊs; -ˌhaʊ zɪz(n.)(pl.)-hous•es
a building used for housing military personnel on guard duty or for the temporary detention of prisoners.
Origin of guardhouse:
a military facility that serves as the headquarters for military police and in which military prisoners can be detained
The building housing military police
A small security station, often at the entrance to a facility or a city.
A military prison
a building which is occupied by the guard, and in which soldiers are confined for misconduct; hence, a lock-up