1. n.1 a knitted pullover.
2 a loose outer jacket of canvas etc. worn by sailors.
3 US a pinafore dress.
Etymology: prob. f. (17th-c., now dial.) jump short coat perh. f. F jupe f. Arab. jubba 2. n.1 a person or animal that jumps.
2 Electr. a short wire used to make or break a circuit.
3 a rope made fast to keep a yard, mast, etc., from jumping.
4 a heavy chisel-ended iron bar for drilling blast-holes.