jump leadBrE /ˈdʒʌmp liːd/ 🔊NAmE /ˈdʒʌmp liːd/ 🔊 (BrE) (NAmE ˈjumper cable) noun [usually plural] one of two cables that are used to start a car when it has no power in its battery. The jump leads connect the battery to the battery of another car. 跨接引线（用以将汽车上无电的电池连接到另一汽车的电池上以发动汽车）