noun, ra·dar often attributive \ˈrā-ˌdär\

: a device that sends out radio waves for finding out the position and speed of a moving object (such as an airplane)

Full Definition of RADAR

:  a device or system consisting usually of a synchronized radio transmitter and receiver that emits radio waves and processes their reflections for display and is used especially for detecting and locating objects (as aircraft) or surface features (as of a planet)
:  range of notice <fell off the radar after losing their first three games>

Examples of RADAR

  1. The approaching planes were detected by radar.

Origin of RADAR

radio detecting and ranging
First Known Use: 1941
RADAR Defined for Kids


noun ra·dar \ˈrā-ˌdär\

Definition of RADAR for Kids

:  a radio device for detecting the position of things in the distance and the direction of moving objects (as distant airplanes or ships)
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