radar
OBJECT DETECTION SYSTEM BASED ON RADIO WAVES
Radio detection and ranging; Airport radar; Radars; RADAR; Radio detecting and ranging; Radar illumination; Radio Detection and Ranging; Radar Homing and Warning; Radar station; Coherent processing interval; Radar system; Microwave radar; Fill pulse; Radar equation; Centimetric radar; Coherent Processing Interval; Radar distance measurement; Radar communication; Air search radar; Radar systems; Remote Radar Head; Applications of radar; Palmer Scan; Radar signal processing; Derax; Radar antenna design
¦ noun a system for detecting the presence, direction, and speed of aircraft, ships, etc., by sending out pulses of radio waves which are reflected off the object back to the source.
Origin
1940s: from ra(dio) d(etection) a(nd) r(anging).