1. barrel - Noun
2. barrel - Verb
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.
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.
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.
A metallic tube, as of a gun, from which a projectile is discharged.
A jar.
The hollow basal part of a feather.
To put or to pack in a barrel or barrels.
Source: Webster's dictionarya barrel of beer is 31 gallons and a barrel of oil is 42 gallons Source: Internet
A barrel organ player wearing a face shield as a precaution against the spread of the new coronavirus, hopes for donations in Mexico City, Saturday, May 16, 2020. Source: Internet
A bigger issue was that its barrel couldn’t be changed out—a serious problem in that it could only be operated in fully automatic mode. Source: Internet
A barrel plug, hex key tool, stand, and USB charging cord are also in the box. Source: Internet
A 7.62 NATO round reaches 50 percent of its velocity within convert of the barrel when fired, so decreasing the barrel length for close quarters combat results in increased muzzle pressure and greater noise and muzzle flash. Source: Internet
According to him, “with an already existing poor/low growth in the non-oil sector, the drop in the oil price to below $30 per barrel would lead to higher fiscal deficit and with dire economic consequences on economic activities and growth. Source: Internet