a quantity or supply of the projectiles (e.g. bullets, cartridges, shells) used in weapons and their accessories, or other explosive weapons like bombs or grenades;
e.g. A machine gun uses ammunition very quickly, and can easily run out of bullets.
(noun)
considerations or other material/information that can be used by a person to support/defend their case or attack someone else's case in a debate;
e.g. Her mistakes provided the opposition with ammunition to charge her as guilty.