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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.

Falling asset prices can be an early warning signal that investors should heed, especially when declines are persistent.

From Barron's • Mar. 13, 2026

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

From MarketWatch • Dec. 21, 2025

According to Zhao, the discovery of GSH-DNA adducts creates new opportunities to study how damaged mtDNA functions as a warning signal inside the body.

From Science Daily • Nov. 28, 2025

The Department for Health and Social Care said that genomics - the study of genes - and AI would be used to "revolutionise prevention" and provide faster diagnoses and an "early warning signal for disease".

From BBC • Jun. 21, 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

warning signal

Example Sentences

Related Words