as in red light
something that tells of approaching danger or risk
the résumé she accidentally left on the office printer was a red flag that she was planning to quit
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Recent Examples of red flag
Meanwhile, there are red flags of stress in auto lending for lower credit buyers, including the recent bankruptcy of subprime auto lender Tricolor — but sales and pricing of new vehicles through the third quarter remained far better than many had expected.
—
Michael Wayland, CNBC, 20 Oct. 2025
What to Know On Monday morning, red flag warnings were issued by the NWS offices in Goodland, Kansas; Pueblo, Colorado; and Denver.
—Anna Skinner, MSNBC Newsweek, 20 Oct. 2025
Those qualities were said to stand out to Posey early in the interview process, and although Vitello is not a traditional candidate, there were no significant red flags raised when the Giants engaged in vetting conversations with others familiar with his background and personality.
—Andrew Baggarly, New York Times, 19 Oct. 2025
The source of its money was opaque, always a red flag on Wall Street.
—Liz Hoffman, semafor.com, 18 Oct. 2025
See All Example Sentences for red flag
Michael Wayland, CNBC, 20 Oct. 2025
What to Know On Monday morning, red flag warnings were issued by the NWS offices in Goodland, Kansas; Pueblo, Colorado; and Denver.
—Anna Skinner, MSNBC Newsweek, 20 Oct. 2025
Those qualities were said to stand out to Posey early in the interview process, and although Vitello is not a traditional candidate, there were no significant red flags raised when the Giants engaged in vetting conversations with others familiar with his background and personality.
—Andrew Baggarly, New York Times, 19 Oct. 2025
The source of its money was opaque, always a red flag on Wall Street.
—Liz Hoffman, semafor.com, 18 Oct. 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
-
Be sure to allow 20-30 minutes for your eyes to adapt to the dark, and use a red light if needed in order to avoid ruining your night vision.—
Anthony Wood,
Space.com,
20 Oct. 2025
-
Heavy curtains are drawn, and a single red light bulb glows from the ceiling.—
Literary Hub,
Literary Hub,
20 Oct. 2025
Noun
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The hearing committee suggested to the guild executives that this should only be a warning.—
David Canfield,
HollywoodReporter,
23 Oct. 2025
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Jamaica’s airports remain open for now, but will likely close within 24 hours of a hurricane warning being issued for the country, according to Daryl Vaz, Minister of Science, Energy, Telecommunications and Transport.—
Briana Waxman,
CNN Money,
23 Oct. 2025
Noun
-
Stephens said there were signs of a struggle, and Thomas' body had been dragged about 180 feet into the woods.—
Bill Bowden,
Arkansas Online,
24 Oct. 2025
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Perri told him that was a sign of his brain rewiring.—
Rustin Dodd,
New York Times,
23 Oct. 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 28 Oct. 2025.
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