button Meaning in the Cambridge English Dictionary
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Meaning of “button” in the English Dictionary

"button" in British English

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buttonnoun [C]

uk   /ˈbʌt.ən/  us   /ˈbʌt̬-/

button noun [C] (ON CLOTHING)

B1 a ​small, usually ​circularobject used to ​fasten something, for ​example a ​shirt or ​coat: I did up/​undid (= ​fastened/​unfastened) the buttons on my ​blouse.
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button noun [C] (ON MACHINE)

B1 a ​small, sometimes ​circularobject that you ​press to ​operate a ​device or a ​machine, or an ​area on a ​computerscreen that ​looks and ​acts like one of these: He ​inserted the ​disk and ​pressed the "​play" button.

buttonverb [I or T]

uk   /ˈbʌt.ən/  us   /ˈbʌt̬-/
to ​fasten something, usually a ​piece of ​clothing, using buttons: Button (up)yourcoat, it's ​coldoutside.
Idioms
(Definition of button from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"button" in American English

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buttonnoun [C]

 us   /ˈbʌt·ən/

button noun [C] (CLOTHING FASTENER)

a ​small, usually ​circularobject that is ​sewn on a ​shirt, ​coat, or other ​piece of ​clothing, and is used to ​fasten it A button is also a ​small, usually ​circularsign that you can ​pin on ​yourclothes: When you ​pay the ​admissionfee at the ​museum, they give you a button to ​wear to show you’ve ​paid.

button noun [C] (OBJECT YOU PRESS)

a ​smallobject that you ​press to ​operate a ​device or a ​machine: The button on the ​leftstarts the ​taperecorder and the one on the ​rightstops it.

buttonverb [T]

 /ˈbʌt·ən/

button verb [T] (FASTEN)

to ​fasten something, usually a ​piece of ​clothing, using buttons: He buttoned his ​shirt.
(Definition of button from the Cambridge Academic Content Dictionary © Cambridge University Press)

"button" in Business English

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buttonnoun [C]

uk   us   /ˈbʌtən/
COMMUNICATIONS, IT a ​small, often ​circularobject which you ​press to ​operate a ​device or a ​machine, or an ​area on a ​computerscreen which looks and ​works like one of these: press/hit/push a button Press the ​green button to ​start the ​machine and the ​red button to ​stop it.the send/save/delete button Always re-read your ​emailmessages carefully before you ​hit the ​send button.
MARKETING →  button ad
(Definition of button from the Cambridge Business English Dictionary © Cambridge University Press)
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