Definitions for "Storm Flap"
Keywords:  zipper, jacket, snap, closure, flaps
a protective flap over an external pant or jacket zipper to keep out the elements. Many garments have more than one storm flap, and individual zippers may have two overlapping flaps for supreme protection.
A strip of fabric that covers the zipper or snap closure of a jacket. Storm flaps can also be sewn on the inside of the zipper.
A strip of fabric covering the zipper or snap closure of the jacket and its pocket.