Looking for the meaning or definition of the word barrel? Here's what it means.
Noun
(countable) A roundvessel or cask, of greater length than breadth, and bulging in the middle, made of staves bound with hoops, and having flat ends or heads. Sometimes applied to a similar cylindrical container made of metal, usually called a drum.
The quantity which constitutes a full barrel: the volume or weight this represents varies by local law and custom.