warning signal

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.

Analysts said the data is a warning signal.

From Barron's • Mar. 24, 2026

The clogged pathways are known as "enlarged perivascular spaces," and the findings suggest they could serve as an early warning signal for Alzheimer's, the most common form of dementia.

From Science Daily • Jan. 3, 2026

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

From MarketWatch • Dec. 21, 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

Obviously the red light was some kind of a warning signal, both outside the door and in—“laboratory animal at large.”

From "Mrs. Frisby and the Rats of NIMH" by Robert C. O'Brien