Home › Words › O › overlockoverlock/ˈəʊvəˌlɒk/overlock · noun — A stitch that sews over the edge of one or two pieces of cloth for edging, hemming or seaming.Definition from Wiktionary (CC BY-SA 3.0).overlock is pronounced /ˈəʊvəˌlɒk/.EtymologyFrom over- + lock.nounA stitch that sews over the edge of one or two pieces of cloth for edging, hemming or seaming.verbTo stitch in this manner.To make the bolt of a lock go too far.e.g.“The way to open it, then, is to turn the key the other way, as if to overlock the bolt […]” — 1857, Thomas Stewart Traill, The Encyclopaedia Britannica:Definitions & examples from Wiktionary (CC BY-SA 3.0).