sos
nounUK /ˌes əʊ ˈes/
US /ˌes oʊ ˈes/
A special call for help when someone is in big trouble.
The ship sent an SOS when it started to sink.
OTHER MEANINGS
2. A message asking for urgent help.
She sent an SOS to her friends when her car broke down.
3. A Morse code signal (... --- ...) used to call for help.
The sailor tapped out SOS on the radio.
4. A brand of scouring pad used for cleaning.
He scrubbed the pan with an SOS pad.