Military stores, or provisions of all kinds for attack or defense.
- Projectiles, such as bullets and shot, together with their fuses and primers, that can be fired from guns or otherwise propelled.
- Nuclear, biological, chemical, or explosive material, such as rockets or grenades, that are used as weapons.
- An object used as a missile in offense or defense: Rocks were my only ammunition against the bear.
- A means of attacking or defending an argument, thesis, or point of view.