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SOS

SOS /ˌɛsˌoʊˈɛs/ noun
SOS
/ˌɛsˌoʊˈɛs/
noun
Learner's definition of SOS
[singular]
: a signal used by ships and airplanes to call for help(船只、飞机等发出的)紧急求救信号often used figuratively常用作比喻
compare mayday

See also: so


1
: an internationally recognized signal of distress in radio code ‧ ‧ ‧ - - - ‧ ‧ ‧ used especially by ships calling for help
2
: a call or request for help or rescue

Word History

First Known Use

1910, in the meaning defined at sense 1

Time Traveler
The first known use of SOS was in 1910

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