ordnance

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Military materiel, such as weapons, ammunition, combat vehicles, and equipment.
2. n. The branch of an armed force that procures, maintains, and issues weapons, ammunition, and combat vehicles.
3. n. Cannon; artillery.

Century Dictionary and Cyclopedia

1. n. Cannon or great guns collectively, including mortars and howitzers; artillery. As a technical term, it designates all heavy pieces fired from carriages. Modern ordnance may be divided into two classes, smooth-bore and rifled. The former are all muzzle-loaders; the latter are subdivided into muzzle-loaders and breech-loaders. Most guns of modern construction are breech-loading rifled arms. Classified according to the material used, cannon are bronze, cast-iron, wrought-iron, steel, or mixed cast (wrought-iron and steel) guns; according to the method of construction, they are called solid or built-up guns. The most modern type of heavy gun is an all-steel built-up breech-loading gun, with a Krupp or interrupted-screw fermeture. Formerly sometimes used in the plural.
2. n. A board composed of United States ordnance-officers distinguished for their attainments in the theory and practice of heavy ordnance, its construction and use, whose duty it is to conduct experiments, and test and report upon all ordnance subjects referred to it by the chief of ordnance. This board is designated by the Secretary of War, and is advisory to the chief of ordnance of the army.

Wiktionary

1. n. military equipment, especially weapons and ammunition.
2. n. artillery.

GNU Webster's 1913

1. n. Heavy weapons of warfare; cannon, or great guns, mortars, and howitzers; artillery; sometimes, a general term for all weapons, ammunitiion, and appliances used in war.

WordNet 3.0

1. n. military supplies
2. n. large but transportable armament