sonar
/ˈsoʊ.nɑːɹ/ noun C1- Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses. · They were able to detect the sunken wreck using sonar.
- A device that provides such echolocation. · They finally bought a new sonar to replace the 40-year-old unit that sometimes didn't work right.
- Any echolocation. · Submarines and bats both use sonar to navigate.
Plural sonars
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