From Longman Dictionary of Contemporary Englishzipperzip‧per /ˈzɪpə $ -ər/ ●●● S3 noun [countable] 
especially American EnglishDC two lines of small metal or plastic pieces that slide together to fasten a piece of clothing SYN zip British English
especially American EnglishDC two lines of small metal or plastic pieces that slide together to fasten a piece of clothing SYN zip British EnglishExamples from the Corpus
zipper• On her head, a zipper of black surgical threads struggled to keep a still-raw wound in place.• A salesperson is usually hovering there, to exchange a garment or help with a zipper.• The coverall has a 25 inch nylon zipper protected by a storm flap secured with Velcro.• She scratched the knife along the zipper of my jeans and threw the blade again.• A little soap on the zipper will make it run more easily.• McGowan had a gun in his hand and he was pushing the muzzle through the zipper and into the tourist's mouth.• The zipper and snaps are solid brass. 