1
- an edible seed, typically kidney-shaped, growing in long pods on certain leguminous plants豆; 蚕豆。
1.1
- the hard seed of coffee, cocoa, and certain other plants咖啡豆; 可可豆。
2
- a leguminous plant that bears such seeds in pods豆科植物。
2.1
- Phaseolus and other genera, family Leguminosae: numerous species, including the runner bean ( P. coccineus ), French bean ( P. vulgaris), and broad bean ( Vicia faba ).菜豆属及其他属, 豆科：众多种, 包括多花菜豆（拉丁名 P. coccineus ）、法国菜豆（拉丁名 P. vulgaris ）和蚕豆（拉丁名 Vicia faba ）。
3
- （ 〈北美〉 亦作beans）with negative informal a very small amount or nothing at all of something (used emphatically)〈非正式〉［用于强调］丝毫, 一点：
there is not a single bean of substance in the report
这份报告里没有一点实质性内容
I didn't know beans about being a step-parent.
我丝毫不知怎么当继父（母）。
3.1
- used in reference to money（一文）钱：
he didn't have a bean.
他身无分文。
ORIGIN: from early 19th-cent. slang denoting a sovereign or guinea.
4
- informal, dated a person's head, especially when regarded as a source of common sense〈非正式, 旧〉脑袋。
with obj.
- informal, chiefly N. Amer. hit (someone) on the head〈非正式, 主北美〉击（某人）的头：
she picked up a rock and beaned him on the forehead.
她捡起一块石头砸在他额头上。
短语
full of beans
- informal lively; in high spirits〈非正式〉精力充沛的; 兴高采烈的。
a hill（或row）of beans
- with negative anything of any importance or value一点, 丝毫; 无价值的东西：
three little people don't amount to a hill of beans in this crazy world.
在这个疯狂的世界上, 三个小人物根本算不上什么。
know how many beans make five
- Brit. informal be intelligent; have one's wits about one〈英, 非正式〉聪明, 不会上当。
old bean
- Brit. informal, dated a friendly form of address, typically to a man〈英, 非正式, 旧〉［尤用于友好地称呼男子］老伙计。
词源
Old English bēan, of Germanic origin; related to Dutch boon and German Bohne.