(n) a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position, Syn.radar beacon, racon
(n) an electronic signal that has been reflected back to the radar antenna; contains information about the location and distance of the reflecting object, Syn.radar echo
n. [ acronym from RAdio Detection And Ranging. ] 1. An electronic device designed to detect objects at a distance, and determine their distance from the device, by transmitting a pulse of radio waves and measuring the time required for the echo of the pulse to return to the emitting device; as, the radar showed a plane approaching rapidly. For more information of radar, see the article What is Radar?. [ acronym ] [ PJC ]
2. The method of detecting objects, finding their distance, or determining their speed, by use of a radar{ 1 } device; as, modern radar can detect objects as small as raindrops. [ PJC ]
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