Thesaurus.com
Dictionary.com
Showing results for warning signal. Search instead for warnsignals.

warning signal

NOUN
alarum
Synonyms
STRONG
alert bell signal siren warning
WEAK
call to arms
NOUN
beacon
Synonyms
STRONGEST
flare lantern radar
STRONG
alarm alert balefire beam bonfire guidepost heliograph lamp lighthouse lodestar pharos rocket sign watchtower
WEAK
signal fire smoke signal
NOUN
distress signal
Synonyms
WEAK
Mayday SOS alarm burglar alarm call for help danger signal fire alarm flare notice to mariners signal of distress
NOUN
high sign
Synonyms
WEAK
alert signal the nod the wink

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.

Acute pain acts as a warning signal, starting when injured tissue, such as a stubbed toe, sends messages through the spinal cord to the brain.

From Science Daily • Apr. 27, 2026

Analysts said the data is a warning signal.

From Barron's • Mar. 24, 2026

Historically, the absence of a year-end rally has carried a warning signal.

From MarketWatch • Dec. 21, 2025

At the same time, there is a clear warning signal here.

From BBC • Sep. 6, 2025

She tried to smile, but it felt more like she was baring her teeth at her friend, a warning signal to stay away.

From "Far from the Tree" by Robin Benway

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "warning signal" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com