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SOS

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the letters represented by the radio telegraphic signal (· · · – – – · · ·) used, especially by ships in distress, as an internationally recognized call for help.
noun
any call for help: We sent out an SOS for more typists.
verb (used without object)
to send an SOS.
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Origin of SOS

1905–10, from the Morse code alphabet, in which three dots (or short clicks) represents the letter S and three dashes (or long clicks) represents the letter O

Other definitions for SOS (2 of 3)

SOS

abbreviation Slang.
shit on a shingle (a euphemistic initialism used to avoid explicit vulgarity).

Other definitions for SOS (3 of 3)

s.o.s.

abbreviation
(in prescriptions) if necessary.

Origin of s.o.s.

From Latin sī opus sit
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use SOS in a sentence

British Dictionary definitions for SOS

SOS

noun
an internationally recognized distress signal in which the letters SOS are repeatedly spelt out, as by radio-telegraphy: used esp by ships and aircraft
a message broadcast in an emergency for people otherwise unobtainable
informal a call for help

Word Origin for SOS

C20: letters chosen as the simplest to transmit and receive in Morse code; by folk etymology taken to be an abbreviation for save our souls
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for SOS

s.o.s.

abbr.
si opus sit (if needed)
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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