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

"fasten" in British English

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uk   /ˈfɑː.sən/  us   /ˈfæs.ən/
B1 [I or T] to (​cause something to) ​becomefirmlyfixed together, or in ​position, or ​closed: Make ​sureyourseatbelt is ​securely fastened. This ​shirt fastens at the back.fasten sth on, together, etc. B2 to ​fix one thing to another: I fastened the ​sticker to the ​windscreen.
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(Definition of fasten from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"fasten" in American English

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fastenverb [I/T]

 us   /ˈfæs·ən/
to make or ​becomefirmlyattached or ​closed: [I] This ​skirt fastens at the back. [T] Fasten ​your seatbelt.
(Definition of fasten from the Cambridge Academic Content Dictionary © Cambridge University Press)
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