[mass noun]a system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects, by sending out pulses of high-frequency electromagnetic waves which are reflected off the object back to the source 雷达,无线电探测系统 ■[count noun]an apparatus used for this 雷达设备,无线电探测器 ■a person's capacity for intuitive perception; a special sensitivity for factors, trends, etc (人的)直觉感知能力;(对因素或潮流等的)敏感性 keep your radar tuned to changes at work. 你要留意工作中的变化。