柯林斯詞典speedometer /sp??d?m?t?/ (speedometers) 1. N-COUNT A speedometer is the instrument in a vehicle which shows how fast the vehicle is moving. (車輛的) 速度計(jì) 返回 speedometer劍橋詞典a device in a vehicle that shows how fast the vehicle is moving （車輛的）速度計(jì)，里程計(jì) 返回 speedometer