jumper

1. a knitted garment typically with long sleeves, worn over the upper body.
2. a loose outer jacket worn by sailors.
3. a pinafore dress.

mid 19th century (in jumper¹ (sense 2 of the noun)): probably from dialect jump ‘short coat’, perhaps from Scots jupe ‘a man's (later also a woman's) loose jacket or tunic’, via Old French from Arabic jubba . Compare with jibba.

1. a person or animal that jumps.

   the horse should be a better jumper this season

   other players in the line-out may only move when the jumper has touched the ball

   an Olympic jumper

2. a short wire used to shorten an electric circuit or close it temporarily.
3. a rope made fast to keep a yard or mast from jumping.
4. a heavy chisel-ended iron bar for drilling blast holes.
5. a mushroom-shaped brass part in a tap which supports the washer.