sonar

noun

so·​nar ˈsō-ˌnär How to pronounce sonar (audio)
: 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 (such as a submarine) by the sound it emits in water

Examples of sonar in a Sentence

They detected the submarine by using sonar.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
On August 20, Halibut's specialized sonar arrays and cameras located the remains of K-129 at a depth of 16,000 ft (4,900 m). David Szondy, New Atlas, 4 Jan. 2025 For that, the team used sonar instruments on the ship to make a high-resolution 3D map of the seafloor. Ashley Balzer Vigil, Ars Technica, 21 Dec. 2024 Still, an extensive search involving underwater drones, towable submersible sonar, divers and three K-9 cadaver teams did not turn up Borgwardt's body. Claire Reid, Journal Sentinel, 11 Dec. 2024 Using the ship’s multibeam sonar system, researchers also created detailed 3D maps of the seafloor. Erika Page, The Christian Science Monitor, 10 Dec. 2024 See all Example Sentences for sonar 

Word History

Etymology

sound navigation ranging

First Known Use

1943, in the meaning defined above

Time Traveler
The first known use of sonar was in 1943

Dictionary Entries Near sonar

Cite this Entry

“Sonar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sonar. Accessed 20 Jan. 2025.

Kids Definition

sonar

noun
so·​nar ˈsō-ˌnär How to pronounce sonar (audio)
: a device for detecting the presence and location of submerged objects (as submarines) by sound waves

More from Merriam-Webster on sonar

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!