Dictionary.com
definitions
  • synonyms

sonobuoy

[son-uh-boo-e, -boi]
noun Navigation.
  1. a buoy that emits a radio signal on receiving an underwater signal from a vessel.
Show More

Origin of sonobuoy

First recorded in 1940–45; sono- + buoy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for sonobuoy

sonobuoy

noun
  1. a buoy equipped to detect underwater noises and transmit them by radio
Show More

Word Origin

from sonic + buoy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012