ソナーalso: ソーナーソナーFreq.FrequencyTop 50,000Meanings1nounsonarRefers to the technology or device for underwater detection using sound waves. A straightforward loanword from English.潜せん水すい艦かんはソナーを使つかって海かい底ていの地ち形けいを調しらべた。The submarine used sonar to survey the seafloor terrain.