Barrel

1. To put or to pack in a barrel or barrels.
2. The hollow basal part of a feather.
3. A jar.
4. A metallic tube, as of a gun, from which a projectile is discharged.
5. The quantity which constitutes a full barrel. This varies for different articles and also in different places for the same article, being regulated by custom or by law. A barrel of wine is 31/ gallons; a barrel of flour is 196 pounds.
6. A round vessel or cask, of greater length than breadth, and bulging in the middle, made of staves bound with hoops, and having flat ends or heads.
7. A solid drum, or a hollow cylinder or case; as, the barrel of a windlass; the barrel of a watch, within which the spring is coiled.