ammunition /ˌæmjuˈnɪʃən/noun 3verb 1forms 3 noun3 •Articles used in charging firearms and ordnance of all kinds; as powder, balls, shot, shells, percussion caps, rockets, etc.Hiro risks turning on a small flashlight, uses it to rummage around the yatcht, picking up valuable stuff: a few bottles of (presumably) drinkable water, some food, extra ammunition for his nine. — 1992 •(figurative) Arguments and information that can be used against the other party in a conflict.They say that the booklet gives them ammunition which is proving effective in breaking down resistance against home building which was created by false propaganda. — 1938 •(no longer used) Military stores, or provisions of all kinds for attack or defense.ammunition shoes verb1 •To supply with ammunition. formsammunitioned · ammunitioning · ammunitions