Meaning

noun a sharp projection on an edge or surface

noun a slit in a garment that exposes material of a different color underneath; used in Renaissance clothing

noun a flap along the edge of a garment; used in medieval clothing

originCirca 1597; originally "load of broom or furze", variant of British English dialectal chag (“tree branch; branch of broom or furze”), from Old English ċeacga (“broom, furze”), from Proto-Germanic *kagô (compare dialectal German Kag (“stump, cabbage, stalk”), Swedish dialect kage (“stumps”), Norwegian dialect kage (“low bush”), of unknown origin.

Etymology from Wiktionary, CC BY-SA 3.0