jumper¹ ◙ noun 1. [Brit.] a knitted garment typically with long sleeves, worn over the upper body • [英] （尤为长袖）毛线上衣 2. (historical)a loose outer jacket worn by sailors • [史] （水手穿的）宽松短上衣 3. [N. Amer.] a pinafore dress • [北美] 围裙
【语源】
1. mid 19th cent. (in sense 2): 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. --› comparejibbajumper² ◙ noun 1. a person or animal that jumps • 跳跃者；跳高运动员；跳跃的动物 2. (也作 jumper wire)a short wire used to shorten an electric circuit or close it temporarily • 跳线，跨接线（一种用于缩短或暂时关闭电路的短线） 3. [Nautical] a rope made fast to keep a yard or mast from jumping • [航海] 支索（防止帆桁或桅杆移动而系紧的绳索） 4. a heavy chisel-ended iron bar for drilling blast holes • 钻孔机；冲击钻杆（一种末端为凿子，用于钻凿钻孔的重铁杆） 5. a mushroom-shaped brass part in a tap which supports the washer • 阀芯（水龙头里托住垫圈的蘑菇状铜制部件）