barrel
n//ˈbæɹ(ə)l//fat, tunna, oljefat, päron, pipa, lopp
(countable) A round (cylindrical) vessel, such as a cask, of greater length than breadth, and bulging in the middle, made of staves bound with hoops, and having flat ends (heads). The word is sometimes applied to a similar cylindrical container made of metal, usually called a drum.
Such a cask of a certain size, holding one-eighth of what a tun#Noun holds. (See a diagram comparing cask sizes.)
A metallic tube, as of a gun, from which a projectile is discharged.