a badge consisting of stripes meeting at an angle, worn on the sleeve by noncommissioned officers, police officers, etc., as an indication of rank, service, or the like.
1390s, from O.Fr. chevron "rafter," since it looks like rafters of a shallow roof, from V.L. *caprione, from L. caper "goat," the likely connection between goats and rafters being the animal's angular hind legs.