Sonar

Definitions

1. Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses.
   uncountable, usually
2. Dated form of sonar.
   alt-of, countable, dated, uncountable
3. A device that provides such echolocation.
   countable
4. Any echolocation.
   broadly, countable, uncountable

Equivalents

Examples

“They were able to detect⟳ the sunken wreck using sonar.”

“They finally bought a new sonar to replace⟳ the 40-year-old unit that sometimes didn't work⟳ right.”

“Submarines and bats both use⟳ sonar to navigate⟳.”

CEFR level