Commissary

noun

1. A store primarily serving persons in an institution, most often soldiers or prisoners.
2. A cafeteria at a movie studio.
3. One to whom is committed some charge, duty, or office, by a superior power; a commissioner.
4. An officer of the bishop, who exercises ecclesiastical jurisdiction in parts of the diocese at a distance from the residence of the bishop.
5. An officer who supplies provisions to an army.