Definition of sonar in English:


Syllabification: so·nar
Pronunciation: /ˈsōˌnär


1A system for the detection of objects under water and for measuring the water’s depth by emitting sound pulses and detecting or measuring their return after being reflected.
More example sentences
  • Out in the Atlantic, vast Japanese factory ships work nonstop, using modern sonar detection to spot the tuna shoals they sweep the ocean clean of fish.
  • For instance, he said, its active and passive sonar systems are aging, thus shortening the range of its monitoring.
  • Now, video footage and sonar data proves conclusively that the wreck is not Centaur.
1.1An apparatus used in a sonar system.
More example sentences
  • It is equipped with a ham radio set, personal computer, global positioning system, two sonars, autopilot and wind wane which steers the boat depending on the direction of the wind.
  • It just seemed to me that it would be more interesting to have things like submarine sonars and old grandfather clocks and lines from famous movies and bird songs and things like that.
  • Acms receives data from the sonars and other sensors and, through advanced algorithms and data handling, displays real time images on the command consoles.
1.2The method of echolocation used in air or water by animals such as bats or whales.
More example sentences
  • Hearing the unusual ping, the animals might turn on their echolocators - their sonar - and then they can sense the net.
  • While the animals lack sonar, they do posses superb directional underwater hearing and the ability to see in near-darkness.
  • They believe that by being in the water with the animals and feeling their sonar they too are receiving a ‘healing’.


1940s: from so(und) na(vigation and) r(anging), on the pattern of radar.

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Pronunciation: ˈdɪs(ə)nənt
lacking harmony