zipper
noun [ C ] US uk/ˈzɪp.ər/ us/ˈzɪp.ɚ/ (UK zip)
B2 拉链，拉锁
a device consisting of two rows of metal or plastic teeth-like parts that are brought together by pulling a small sliding piece over them, used for closing openings in clothing, bags, etc.
to pull a zipper up/down 拉上／拉开拉链
I can't open my bag - the zipper is stuck. 我的包打不开——拉链卡住了。