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Definition of zipper
1a device consisting of two flexible strips of metal or plastic with interlocking projections closed or opened by pulling a slide along them, used to fasten garments, bags, and other items. 2a display of news or advertisements that scrolls across an illuminated screen fixed to the upper part of a building.
verb [with object]
fasten or provide (something) with a zipper:he wore a running suit zippered up tight