Definition of SOS noun from the Oxford Advanced Learner's Dictionary

     

    SOS

     noun
    noun
    BrE BrE//ˌes əʊ ˈes//
     
    ; NAmE NAmE//ˌes ˈes//
     
    [singular] Travelling by boat or ship
     
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  1. 1a signal or message that a ship or plane sends when it needs urgent help to send an SOS an SOS message See related entries: Travelling by boat or ship
  2. 2an urgent request for help We've received an SOS from the area asking for food parcels. see also Mayday
  3. Word Origin early 20th cent.: letters chosen as being easily transmitted and recognized in Morse code; by folk etymology an abbreviation of save our souls.
See the Oxford Advanced American Dictionary entry: SOS

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