May 21, 2021
Learner's Word of the Day
radar /ˈreɪˌdɑɚ/ noun

plural radars

Radar screen
Radar screen
Learner's definition of RADAR

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


  • a powerful radar


  • The approaching planes were detected by radar.

— often used figuratively in informal U.S. English

  • A career in politics wasn't even on my radar (screen) at that point. [=I wasn't thinking at all about a career in politics]

  • an actor who has fallen off the radar [=who has stopped being noticed or talked about]

  • He tried to stay under the radar [=unnoticed] as he went about his business.

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