jet·ti·son/`dʒɛtəsṇ; ˈdʒetɪsən/ v [T] 1 to get rid of something that you do not need or want 除掉，摆脱: The company is trying to jettison any unprofitable operations. 该公司试图放弃任何无利可图的业务。 2 to throw something away, from a plane or moving vehicle 〔从正在行进的飞机或车辆上〕扔掉，丢弃: The pilot had to jettison some fuel. 飞机驾驶员不得不放掉了一些燃料。