janitor
n. countable B1 Intermediate US //ˈdʒænətɝ// UK //dʒˈænɪtɐ// jan·i·tor
n. a person whose job is to take care of a building. They usually clean the floors, fix small problems, and look after the heating system.
n. a person employed to maintain, clean, and provide security for a building, such as a school or office complex. Often synonymous with 'custodian' or 'caretaker'.
The janitor cleans the hallways every night.
After the basketball game, the school janitor stayed late to mop the gym floor and lock the doors.
While the administrative staff handled the paperwork, the janitor was responsible for the physical integrity of the facility, managing everything from plumbing repairs to waste disposal.
From Latin ianitor (“doorkeeper”).