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Definition of fastener noun from the Oxford Advanced Learner's Dictionary

picture of a zip

fastener

noun

fastener pronunciation English

ˈfɑːsnə(r) fastener pronunciation American

fastener pronunciation American

ˈfæsnər

(also fastening)

a device, such as a button or a zip/zipper, used to close a piece of clothing; a device used to close a window, suitcase, etc. tightly