Definitions

1. noun

a device for joining or separating two edges of a fabric by interlocking teeth, typically used for fastening a garment or bag

“She tried to zip up her jacket but the zipper broke.”

2. verb

to fasten or unfasten something using a zipper

“Can you zip up the backpack for me?”

3. verb

to move or go quickly, typically in a smooth or continuous manner

“The train will zip across the country in just a few hours.”