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Zip Code (Trademark) Zip Code is a U.S. Postal Service system that uses a code of five or more numbers to identify every postal delivery area in the United States. Zip stands for "Zone Improvement Plan."
zip drive (trademark) a computer part that saves information on a special disk, called a "zip disk."
zip gun a crude handmade pistol, usu. consisting of a piece of pipe attached to a wooden stock, that fires a .22-caliber bullet.
zip up to close the zipper on (something).