sonar Meaning in the Cambridge English Dictionary
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Meaning of “sonar” in the English Dictionary

"sonar" in British English

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sonarnoun [U]

uk   /ˈsəʊ.nɑːr/  us   /ˈsoʊ.nɑːr/
equipment, ​especially on a ​ship, that uses ​soundwaves 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 Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sonar" in American English

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sonarnoun [U]

 us   /ˈsoʊ·nɑr/
a ​device on a ​ship that uses ​sound to show the ​position of ​objects under the ​water
(Definition of sonar from the Cambridge Academic Content Dictionary © Cambridge University Press)
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