ＳＯＳalso: エスオーエスFreq.FrequencyTop 20,000Meanings1nounSOS; distress signalThe international Morse code distress signal; used as a noun in Japanese to refer to a call for help.遭そう難なん船せんがＳＯＳを発はっ信しんした。The ship in distress sent out an SOS.
