artillery

Short definition from Wiktionary

Noun

1. 1
   Large projectile weapons, in modern usage usually large guns, but also rocket artillery.
2. 2
   An army unit that uses such weapons, or a military formation using projectile weapons, such as archers.
3. 3
   Gunnery (design and manufacture of guns).
4. 4
   Weapons, especially siege engines.
5. 5
   One or more guns.