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: a device that is made of two rows of metal or plastic teeth and another piece that slides over the teeth to make them fit together or come apart and that is used to fasten clothing, open or close bags, etc.
Full Definition of ZIPPER
: a fastener consisting of two rows of metal or plastic teeth on strips of tape and a sliding piece that closes an opening by drawing the teeth together
Device for binding the edges of an opening, as on a garment or a bag. A zipper consists of two strips of material with metal or plastic teeth along the edges, and a sliding piece that interlocks the teeth when moved in one direction and separates them again when moved in the opposite direction. The idea of a slide fastener was first exhibited by Whitcomb L. Judson (died 1909) at the World's Columbian Exposition of 1893. The modern form of the zipper began to appear on clothing in the late 1920s.