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Definitions

SOS

NOUN
alarm
Synonyms
STRONGEST
alert buzzer caution cry signal warning whistle
STRONG
Mayday bell blast call clock drum flap flash forewarning gong horn nod scramble scream shout sign siren squeal tip tocsin trumpet wink yell
WEAK
high sign tip off
Antonyms
WEAK
assurance calmness composure confidence peace quietness repose security
NOUN
alert
Synonyms
STRONGEST
alarm signal
STRONG
Mayday admonition flap sign siren wink
WEAK
high sign tip off
NOUN
distress signal
Synonyms
STRONGEST
warning signal
WEAK
Mayday alarm burglar alarm call for help danger signal fire alarm flare notice to mariners signal of distress
NOUN
signal
Synonyms
STRONGEST
alarm beacon cue gesture indicator sign
STRONG
Mayday alert bleep blinker flag flare go ahead mark movement nod okay omen tocsin token wink
WEAK
green light high sign
Antonyms
STRONG
denial refusal veto
NOUN
warning
Synonyms
STRONGEST
admonition advice alarm alert caution example guidance hint indication information lesson notification prediction recommendation sign signal suggestion threat word
STRONG
Mayday augury caveat exhortation fore foretoken forewarning injunction intimation omen portent premonition presage tip tip-off token wink
WEAK
distress signal handwriting on the wall heads up look out watch-it word to the wise
Antonyms
STRONGEST
misinformation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“Typically, a blockade does not mean a complete shutdown, but rather a disruption to the flow of imports and exports,” said Tim Meehan, security director for assistance in the Americas at International SOS.

From MarketWatch • Apr. 14, 2026

Curbside SOS serves individual drivers, while Honk caters to businesses like fleet managers or insurance companies.

From The Wall Street Journal • Apr. 3, 2026

Smith answered an SOS call last week and flew to Sri Lanka after captain and regular opening batsman Mitchell Marsh was injured by a throw-down during batting practice in Colombo a week ago.

From Barron's • Feb. 16, 2026

The goal of SOS is to impose standards in the social media industry much like video game, music and television industries caters to independent rating systems that indicate the age appropriateness of content.

From Salon • Feb. 11, 2026

I didn’t see anything out there worth a battery-draining SOS flash.

From "Adrift" by Paul Griffin