sonar definition, meaning - what is sonar in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “sonar”

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sonar

noun [U] uk   /ˈsəʊ.nɑːr/  us   /ˈsoʊ.nɑːr/
equipment, especially on a ship, which uses sound waves to discover how deep the water is or the position of an object in the water, such as a group of fish
(Definition of sonar from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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