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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 SOS /ˌɛs(ˌ)oˈɛs/
 安全操作系統

From: Webster's Revised Unabridged Dictionary (1913)

 SOS. The letters signified by the signal ( . . . --- . . . ) prescribed by the International Radiotelegraphic Convention of 1912 for use by ships in distress.
 

From: WordNet (r) 2.0

 SOS
      n : an internationally recognized distress signal in radio code