词典释义：
a small disc or knob sewn on to a garment, either to fasten it by being pushed through a slit made for the purpose or for decoration
纽扣，扣子。
a knob on a piece of electrical or electronic equipment which is pressed to operate it
按钮。
〈主北美〉 纽扣徽章，圆形徽章。
a small round object resembling a button
纽扣状物
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chocolate buttons .纽扣巧克力。
【剑】 剑头防护帽。
used in reference to things of little worth
不值钱的东西
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he will never give away anything that is worth a button. 他连不值钱的东西也从不给人。
fasten (clothing) with buttons
扣上（扣子），把… 的纽扣扣上；用纽扣扣住
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he buttoned up his jacket .他扣上了夹克衫。
(
扣紧（穿在身上的）衣服
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he buttoned himself into the raincoat .他把身上雨衣扣紧。
[no obj.](of a garment)be fastened with buttons
（衣服）用纽扣扣紧
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a dress which buttoned down the front. 前襟带一列扣子的衣服。
attach buttons to
钉扣子
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white shiny plastic that was buttoned here and there. 钉满了扣子的白色闪光塑料板
[often in imperative](
〈非正式〉 闭嘴。
Jenson (Alexander Lyons) (b.1980), English motor-racing driver. He won the Formula One world championship in 2009.
巴顿，詹森（·亚历山大·莱昂斯）（生于１９８０年，英国赛车手，于２００９年赢得一级方程式大奖赛的世界冠军）。
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button one's lip informal stop or refrain from talking 〈非正式〉 不要吭声，住嘴 -
on the button informal, chiefly US punctually 〈非正式，主美〉 准时地；如期地she would arrive on the button . 她会如期到达 -
exactly right 完全正确
his pond was right on the button in terms of size . 就大小而言他的水池刚刚好 -
press the button informal initiate an action or train of events （often used to refer to the ease with which a nuclear war might be started） 〈非正式〉 按电钮启动（常用来形容发动核战争多么容易） -
push （或press ）someone's buttons informal arouse or provoke a reaction of someone 〈非正式〉 引起反应don't allow co-workers to push your buttons . 别让你的同事牵着你的鼻子走
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button something up 1 informal complete or conclude something satisfactorily 〈非正式〉 圆满结束trying to button up a deal . 试图做成一笔交易 -
2 ［often as adj.buttoned up ］ repress or contain something 压制，控制it was repressive enough to keep public opinion buttoned up . 弹压民意真是太专制了
"Middle English： from Old French
