sonar

nounattested in dialogue

United Kingdom//ˈsəʊ.nɑː//
United States//ˈsoʊ.nɑːɹ//

Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses.

noun

1
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.
2
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.
3
Any echolocation.
Submarines and bats both use sonar to navigate.

Etymology

By anacronymic evolution from SONAR.

Forms

plural: sonars

son · One's male offspring.Son · One of the three persons of the Trinity, believed to have…son-in-law · The husband of one's child.

sonar · Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that…

song · A musical composition with lyrics for voice or voices,…Song · A surname from Chinese.Sonia · A female given name from Russian (the usual UK spelling of…

The neighbouring pages — Alphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.