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n. - 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.

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Usage examples (36)
  • sonar is an acronym for sound navigation ranging
  • Their echolocation sonar is far beyond our military science.
  • It was detected about five years ago with sonar from a surface vessel.
  • If your sonar is marking fish at 25 feet, for example, let out about 3.5 colors.
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We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.