noun so·nar \ˈsō-ˌnär\

: a device used for finding things that are underwater by using sound waves

Full Definition of SONAR

:  a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects; also :  a device for detecting the presence of a vessel (as a submarine) by the sound it emits in water

Examples of SONAR

  1. They detected the submarine by using sonar.

Origin of SONAR

sound navigation ranging
First Known Use: 1945
SONAR Defined for Kids


noun so·nar \ˈsō-ˌnär\

Definition of SONAR for Kids

:  a device for detecting objects underwater using reflected sound waves


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July 07, 2015
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