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Line breaks: radar
Pronunciation: /ˈreɪdɑː

Definition of radar in English:


[mass noun]
1A 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.
Example sentences
  • Chavez reported that Venezuelan radar detected the presence of the ships and planes during the coup attempt.
  • That expelling of exhaust is vital in detecting their presence on radar.
  • Digital cellphones are similar to radar, using pulses carried by microwaves.
1.1 [count noun] An apparatus used for radar.
Example sentences
  • Invading foreign computer networks could shut down radars and electrical plants and disrupt telephone lines without firing a shot.
  • Cyclone detection doppler radars are replacing the conventional analogue radars in important locations along the east coast.
  • Park Air is a world leader in the field of integration, processing and display of data from radars, sensors and databases.
1.2 [count noun] A person’s capacity for intuitive perception; a special sensitivity for factors, trends, etc. keep your radar tuned to changes at work
More example sentences
  • She continued to explore adventurous roles whenever possible, though her radar was not always perfect.
  • The casting directors all like to boast that they have a very sensitive radar for people who just want the celebrity of it.
  • But if you have an overly sensitive radar for cinematic pomp, stay clear.
1.3Used to indicate that someone or something has or has not come to the attention of a person or group: he’s off the radar in the UK but in his country of birth he’s a well-known figure
More example sentences
  • From a finance standpoint, Telemundo is the merest blip on GE's radar.
  • His private life better known in Britain than here at home has not appeared on the radar of the Canadian media.
  • Just a couple of things we want to put on your radar, certainly on our radar, this morning.


1940s: from ra(dio) d(etection) a(nd) r(anging).

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