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radar
Definitions
[ˈreɪdɑː], (Noun)
Definitions:
- a system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects, by sending out pulses of radio waves which are reflected off the object back to the source
Phrases:
Origin
:
1940s: from ra(dio) d(etection) a(nd) r(anging)
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definition by Oxford Dictionaries