radar /ˈreidə/ (radio detecting and ranging的首字母缩略词) n. ［c］雷达，无线电探测器：laser radar 激光雷达；a radar set 雷达装置；air search radar 防空雷达；follow the flight of an aircraft by radar 用雷达跟踪飞机；a radar operator 雷达员，雷达操作人员