1
- a cylindrical container bulging out in the middle, traditionally made of wooden staves with metal hoops round them桶（传统上以木条和铁箍制成）。
1.1
- such a container together with its contents一桶之量：
a barrel of beer.
一桶啤酒。
1.2
- a measure of capacity used for oil and beer. It is usually equal to 36 imperial gallons for beer and 35 imperial gallons or 42 US gallons (roughly 192 litres) for oil.桶（油或啤酒的容积单位, 通常相当于36英制加仑啤酒, 35英制加仑或42美制加仑 ［约合192升］ 油）。
2
- a cylindrical tube forming part of an object such as a gun or a pen枪管; 笔杆。
3
- the belly and loins of a four-legged animal such as a horse（马等四足动物的）躯干。
(barrelled, barrelling; <北美> barreled, barreling)
1
- no obj., with adverbial of direction informal, chiefly N. Amer. drive or move in a way that is so fast as to almost be out of control〈非正式, 主北美〉高速行驶; 飞奔：
they shot him and then barreled away in the truck.
他们击中他之后驾卡车飞奔而去。
2
- with obj. put into a barrel or barrels把…装桶。
短语
a barrel of laughs
- with negative informal a source of amusement or pleasure〈非正式〉快乐之源：
life is not exactly a barrel of laughs at the moment.
此刻生活并非欢乐无限。
over a barrel
- informal in a helpless position; at someone's mercy〈非正式〉处于不利（或无助）地位; 受制于人：
I like doing business with a man who knows he's over a barrel.
我喜欢和明白自己受制于人的人做生意。
with both barrels
- informal, chiefly US with unrestrained force or emotion〈非正式, 主美〉全力以赴; 全情投入。
词源
Middle English: from Old French baril, from medieval Latin barriclus 'small cask'.