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View synonyms for radar

radar

[ rey-dahr ]

noun

  1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns.
  2. a means or sense of awareness or perception:

    lobbyists working under the media's radar.



radar

/ ˈreɪdɑː /

noun

  1. a method for detecting the position and velocity of a distant object, such as an aircraft A narrow beam of extremely high-frequency radio pulses is transmitted and reflected by the object back to the transmitter, the signal being displayed on a radarscope. The direction of the reflected beam and the time between transmission and reception of a pulse determine the position of the object Former nameradiolocation
  2. the equipment used in such detection
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

radar

/ där /

  1. A method of detecting distant objects and determining their position, speed, material composition, or other characteristics by causing radio waves to be reflected from them and analyzing the reflected waves. The waves can be converted into images, as for use on weather maps.
  2. The equipment used in such detecting.
  3. See also Doppler effect

radar

  1. A method of finding the position and velocity of an object by bouncing a radio wave off it and analyzing the reflected wave. Radar is an acronym for ra dio d etection a nd r anging.
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Notes

Police use radar techniques to determine the speed of automobiles.
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Other Words From

  • anti·radar noun adjective
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Word History and Origins

Origin of radar1

1940–45, Americanism; ra(dio) d(etecting) a(nd) r(anging)
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Word History and Origins

Origin of radar1

C20 ra ( dio ) d ( etecting ) a ( nd ) r ( anging )
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Compare Meanings

How does radar compare to similar and commonly confused words? Explore the most common comparisons:

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Example Sentences

It lost communication with air traffic control less than an hour after take-off and radar showed that it deviated from its planned flight path.

From BBC

With thousands missing mostly in areas where undocumented immigrants were living, "by definition it's a population that is... not on the radar of the administration", she said.

From BBC

This book is where McVeigh found his blueprint, but it landed on his radar because a decade before him, another young man had also tried to make that fictional book a reality.

Vision loss, another possible complication of diabetes, wasn’t really on his radar.

From BBC

They included fighter aircraft, radar and air defence sites, and naval ships, as well as weapons stockpiles, the IDF said.

From BBC

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RADAradar astronomy

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