the short, thick first digit of the human hand, set lower and apart from the other four and opposable to them
拇指。
the corresponding digit of primates or other mammals
（灵长目动物或其他哺乳动物的）第一指。
the part of a glove intended to cover the thumb
（手套的）拇指部分。
press, move, or touch (something) with one's thumb
用拇指揿（或按、摸、顶、指、戳、擦等）
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as soon as she thumbed the button, the door slid open .她用拇指一触按钮，门就滑开了。
turn over (pages ) with or as if with one's thumb
用拇指翻动；翻阅
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I've thumbed my address book and found quite a range of smaller hotels 我翻看我的通讯录，发现里面记了一长串的小旅馆
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[no obj.]
he was thumbing through USA Todayfor the umpteenth time .他已经是不知第几次在翻阅这本《今日美国》了。
(一般作
翻旧（或翻破、翻脏）（书页）
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his dictionaries were thumbed and ink-stained .他的词典均起折角，墨汁斑斑。
[no obj.]use one's thumb to indicate something
用拇指示意
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he thumbed towards the men behind him .他用拇指指着他后面的人。
request or obtain (a free ride in a passing vehicle) by signalling with one's thumb
竖起拇指向过路汽车要求（免费搭乘）
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three cars passed me and I tried to thumb a lift 三辆车经过我身边，我伸出拇指想搭便车
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[no obj.]
he was thumbing his way across France 他搭乘便车行遍法国。
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be all thumbs another way of sayingbe all fingers and thumbs （seeＦIＮＧＥＲ ）. 同be all fingers and thumbs （见ＦIＮＧＥＲ ） -
thumb one's nose at informal show disdain or contempt for 〈非正式〉 对…嗤之以鼻，蔑视 -
thumbs up （或down ）informal an indication of satisfaction or approval （or of rejection or failure） 〈非正式〉 赞同；赞赏，满意（或否定、排斥、反对、拒绝、抛弃）plans to build a house on the site have been given the thumbs down by the Department of the Environment . 环境部反对在这个地方建房的计划 -
［ORIGIN with reference to the signal of approval or disapproval, used by spectators at a Roman amphitheatre; the sense has been reversed, as the Romans used ‘thumbs down' to signify that a beaten gladiator had performed well and should be spared, and ‘thumbs up' to call for his death.］
under someone's thumb completely under someone's influence or control 在某人的支配（或控制）下，在某人的巨大影响之下
"Old English
