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IELTS BNC: 4542 COCA: 4347
pinnoun [ C ]uk/pɪn/ us/pɪn/

pin noun [ C ] METAL STICK

B1 a small thin piece of metal with a point at one end, especially used for temporarily holding pieces of cloth together（尤指用于固定布料用的）别针，大头针

I'll keep the trouser patch in place with pins while I sew it on.在把裤子的补丁缝上去时，我会用别针把它固定好。

a thin piece of metal钉，楔，销，栓

If you pull the pin out of a hand-grenade, it'll explode.拉掉手榴弹上的保险针它就会爆炸。
a two-pin/three-pin electrical plug那是两相插头还是三相插头？
Doctors inserted a metal pin in his leg to hold the bones together.医生们把一根钢针钉进他腿里把骨头固定住。

a decorative object, used as jewellery饰针

a hat/tie pin女帽饰针／领带夹

US a brooch 胸针（同 brooch）

More examples

He stuck up a notice on the board with pins.

She'd used some pins to hold the seam together.

I've not stitched the hem yet, it's just held up with pins.

Don't prick yourself on those pins.

They had to insert a pin into his knee joint.

pin noun [ C ] LEG

[ usually plural ] old-fashioned humorous a leg腿

Grandpa's very old now and he's very shaky on his pins.爷爷现在年纪很大了，走路有点不稳。

pin noun [ C ] IN CHESS

specialized games In the game of chess, a pin is a special move that stops the other player from moving one of their pieces, because to move it will put another more valuable piece in danger.牵制，困子（国际象棋中“牵制”或“困子”，是特殊的一步，移动后阻止另一方移动棋子，因为移动棋子会使另一个更重要的棋子有危险）

That nasty pin stopped me from moving my knight.这步讨厌的牵制，使我无法移动我的马。

Idiom(s)

be on pins and needles
pinverbuk/pɪn/ us/pɪn/ -nn-

pin verb METAL STICK

B1 [ T + adv/prep ] to fasten something with a pin（用别针等）别住，钉住，固定住

A large picture of the president was pinned to/(up) on the office wall.总统的巨幅照片钉在了办公室的墙上。
She had pinned up her beautiful long hair.她把她那美丽的长发用发夹别了起来。

[ T ] US old-fashioned When a young man pins a young woman, he gives her a piece of jewellery to show that they love each other.（青年男子）向（青年女子）赠送首饰

More examples

A flower was pinned to her lapel.

She'd pinned a brooch on her jacket.

He pinned a notice on the board.

We're not allowed to pin anything on these walls.

He had a red ribbon pinned to his collar.

pin verb STOP MOVEMENT

[ T + adv/prep ] to force someone or something to stay in a particular place by putting weight on him, her, or it按住，压住

She was pinned (down) under a pile of rubble.她被压在了一堆碎石下面。
A guy leaped out at me and pinned me (up) against the wall.一个家伙向我扑过来，把我按在了墙上。

Idiom(s)

pin back your ears
pin your hopes on sth/sb

Phrasal verb(s)

pin sb down
pin sth down
pin sth on sb
PINnoun [ C ]uk/pɪn/ us/pɪn/ also PIN number

abbreviation for personal identification number : a secret number that a person uses together with a special card to get money from their bank account out of a machine, or when paying by credit card 个人身份识别码；银行卡密码（personal identification number 的缩写）

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