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a seed, or pod containing seeds, of a climbing plant, eaten as a vegetable. There are several types of bean and the plants that they grow on are also called beans. 豆；菜豆；豆荚；豆科植物 
green beans 青豆 runner beans 红花菜豆 beans (= baked beans) on toast 面包片加烘豆 a can/tin of beans 一罐/罐豆 She grows her own broad beans. 她自己种蚕豆。
Oxford Collocations Dictionaryadjective- broad
- butter
- chilli
- …
- plant
- grow
- drain
- …
- curd
- sprout
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(usually in compounds 通常构成复合词 a seed from a coffee plant, or some other plants （咖啡树或其他某些植物的）籽实 cocoa/coffee beans 可可/咖啡豆
Oxford Collocations Dictionaryadjective- castor
- cocoa
- coffee
- …
- roast
- grind
Word OriginOld English bēan, of Germanic origin; related to Dutch boon and German Bohne.
Idioms
full of beans/life
(of a person 人 having a lot of energy 精力充沛
a hill of beans
- (North American English, old-fashioned, informal)
something that is not worth much 没有多大价值的东西
not have a bean
- (British English, informal)
to have no money 没钱；不名一文
not know beans about something
- (North American English, informal)
to know nothing about a subject 完全不懂行；对…一窍不通 I don’t know beans about making movies. 我不知道要拍电影。
spill the beans
- (informal)
to tell somebody something that should be kept secret or private 泄露秘密；说漏嘴