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warning sign

NOUN
sign of things to come
Synonyms
WEAK
danger sign foreshadowing handwriting on the wall harbinger portent prediction preindication premonition sign signal warning

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.

Going to bed at different times each night during midlife could be a warning sign for future heart problems.

From Science Daily • May 5, 2026

In the early days of stagflation, stocks and bonds can act more as an early warning sign than a contemporary indicator that stagflationary conditions are here.

From MarketWatch • May 4, 2026

Dr Aziza sorts fact from fiction, explains when a daytime snooze could be a warning sign, and whether an espresso really helps you nail the perfect power nap.

From BBC • May 4, 2026

Record bond-fund inflows are a warning sign that lower returns are ahead.

From The Wall Street Journal • Apr. 22, 2026

There was a warning sign and an electrified fence stretching as far as he could see.

From "Stormbreaker" by Anthony Horowitz