ETYM Perh. orig., a lock for a pad gate, or a gate opening to a path, or perh., a lock for a basket or pannier, and from Prov. Eng. pad a pannier. Related to Pad a path, Paddler.
A detachable lock; has a hinged shackle that can be passed through the staple of a hasp or the links in a chain and then snapped shut.