radar

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

Definition of radar

1 :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 (such as aircraft) or surface features (as of a planet)
2 :range of notice
  • fell off the radar after losing their first three games

Examples of radar in a Sentence

  1. The approaching planes were detected by radar.

Recent Examples of radar from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of radar

radio detecting and ranging



RADAR Defined for English Language Learners

radar

noun

Definition of radar for English Language Learners

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


RADAR Defined for Kids

radar

noun ra·dar \ ˈrā-ˌdär \

Definition of radar for Students

: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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