Available Definitions:
1) a. - Having a barrel; -- used in composition; as, a double-barreled gun.
2) n. - 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.
3) n. - 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.
4) n. - A metallic tube, as of a gun, from which a projectile is discharged.
5) n. - A jar.
6) n. - The hollow basal part of a feather.
7) v. t. - To put or to pack in a barrel or barrels.