noun🔗ShareソノブイA buoy that sends a radio signal when it detects the sound of underwater objects (such as submarines)."The navy deployed a sonobuoy from the helicopter to listen for any unusual sounds in the ocean, hoping to detect a submarine. "海軍は潜水艦を探知するため、ヘリコプターからソノブイを配備し、海で異常な音がないか聞き耳を立てた。nauticalmilitarytechnologysignalsoundoceandeviceelectronicsmachinewarvehicleChat with AIVocabulary GamePractice Reading