Noun: sonar sow-naa(r)
- A measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
"sonar is an acronym for sound navigation ranging";
- echo sounder, asdic
Derived forms: sonars
Type of: measuring device, measuring instrument, measuring system, navigational instrument
Part of: pigboat [informal], sub [informal], submarine
Encyclopedia: Sonar