General use as a modifier; esp. with reference to the storage or transport of ammunition, as ammunition box, ammunition depot, ammunition wagon, etc.

Military. A chest containing ammunition; a wagon for conveying ammunition. Also figurative.

a covered cart for carrying gunpowder.

†(a) Military a two-wheeled carriage used to carry ammunition and gunners (obsolete. rare); (b) a battery used in a car; (in later use chiefly) spec.…