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a type of soft flat hat with a peak (= a hard curved part sticking out in front). Caps are worn especially by men and boys, often as part of a uniform （尤指男用有帽舌的）便帽，制服帽 
to wear a cap. 戴帽子。 to put on/take off a cap 戴上/脱下帽子 to have a cap on 戴上帽子 a school cap 学生帽 a peaked cap 鸭舌帽
Oxford Collocations Dictionaryadjective- school
- shower
- skull
- …
- doff
- tip
- badge
(usually in compounds 通常构成复合词 a soft hat that fits closely and is worn for a particular purpose 软帽 a shower cap 浴帽
Oxford Collocations Dictionaryadjective- school
- shower
- skull
- …
- doff
- tip
- badge
a soft hat with a square flat top worn by some university teachers and students at special ceremonies （大学师生在特别场合戴的）方帽 - (British English)
a cap given to somebody who is chosen to play for a school, country, etc.; a player chosen to play for their country, etc. （校队、国家队等的）队员帽；（被选入国家队等的）运动员 a cover or top for a pen, bottle, etc. （钢笔、瓶子等的）帽，盖 
a lens cap 镜头盖 The bottle has a screw cap. 这个瓶子有一个螺旋盖。
Synonyms lidlid- top
- cork
- cap
- plug
- lid a cover over a container that can be removed or opened by turning or lifting it:
a jar with a tight-fitting lid 盖子很紧的广口瓶
- top
a thing that you put over the end of something such as a pen or bottle in order to close it 指笔帽、瓶盖、瓶塞 - cork
a small, round object made of cork or plastic that is used for closing bottles, especially wine bottles 指尤用于酒瓶的软木塞、塑料瓶塞 - cap (often in compounds) a top for a pen or a cover for protecting something such as the lens of a camera
- plug a round piece of material that you put into a hole in order to block it; a flat, round rubber or plastic thing that you put into the hole of a sink in order to stop the water from flowing out:
a bath plug 浴缸塞子
- a tight-fitting lid/top/cap
- a screw top/cap
- a pen lid/top
- to put on/screw on/take off/unscrew the lid/top/cap
- to pull out the cork/plug
Oxford Collocations Dictionaryadjective- bottle
- hub
- lens
- …
- put on
- screw on
- remove
- …
an artificial cover for a damaged tooth 包（牙） He needed four caps for his teeth after the accident. 事故发生后，他需要四顶牙套。
the top of a mountain or a wave 帽： 山顶或海浪的顶部Purple mist sat below the snowy mountain caps. 紫色的薄雾笼罩着白雪皑皑的山帽。
an upper limit on an amount of money that can be spent or borrowed by a particular institution or in a particular situation （可用或可借资金的）最高限额 a small paper container with explosive powder inside it, used especially in toy guns （尤用于玩具枪的）火药帽，火药纸 - (British English) (also diaphragm British and North American English)
a rubber or plastic device that a woman places inside her vagina before having sex to prevent sperm from entering the womb and making her pregnant 子宫帽（避孕用具） see also cradle cap, dunce’s cap, ice cap, thinking cap
hat帽子
in sport体育运动
on pen/bottle钢笔；瓶子
on tooth牙齿
on mountain/wave
limit on money资金限额
in toy guns玩具枪
for woman妇女
Word OriginOld English cæppe ‘hood’, from late Latin cappa, perhaps from Latin caput ‘head’.
Idioms
a feather in your cap
an action that you can be proud of 可引以自豪的行为
go cap in hand (to somebody) (especially British English)
(North American English usually go hat in hand)
to ask somebody for something, especially money, in a very polite way that makes you seem less important 谦卑地要，恭敬地讨（尤指钱） There’s no way he’ll go cap in hand to his brother. 他不可能对他的兄弟卑躬屈膝。
if the cap fits (, wear it) (British English)
(North American English if the shoe fits (, wear it))
- (informal)
if you feel that a remark applies to you, you should accept it and take it as a warning or criticism 有则改之 I didn’t actually say that you were lazy, but if the cap fits… 我并没有真的说你懒，但有则改之…