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English definition of “button”

button

noun [C] uk   /ˈbʌt.ən/ us    /ˈbʌt̬-/

button noun [C] (ON CLOTHING)

B1 a small, usually circular object used to fasten something, for example a shirt or coat: I did up/undid (= fastened/unfastened) the buttons on my blouse.Fastening clothing and textiles

button noun [C] (ON MACHINE)

B1 a small, sometimes circular object that you press to operate a device or a machine, or an area on a computer screen that looks and acts like one of these: He inserted the disk and pressed the "play" button.Electrical switches and connections

button

verb [I or T] uk   /ˈbʌt.ən/ us    /ˈbʌt̬-/
to fasten something, usually a piece of clothing, using buttons: Button (up) your coat, it's cold outside.Fastening clothing and textiles
Idioms
(Definition of button from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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