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
Fortunately, there are ways to recognize red flags that indicate suspicious job descriptions.
—
Bryan Robinson, Forbes.com, 6 July 2025
Olfactory red flags Not all odor changes are normal, experts warn.
—Khloe Quill, FOXNews.com, 5 July 2025
The third free practice at Silverstone saw two red flags in the final ten minutes, bringing the session to an abrupt halt.
—Saajan Jogia, MSNBC Newsweek, 5 July 2025
Watch for common red flags: Be cautious of sudden friend requests from unfamiliar accounts, vague messages that mention surprise winnings, poor grammar or any pressure to act quickly.
—Kurt Knutsson, FOXNews.com, 26 June 2025
See All Example Sentences for red flag
Bryan Robinson, Forbes.com, 6 July 2025
Olfactory red flags Not all odor changes are normal, experts warn.
—Khloe Quill, FOXNews.com, 5 July 2025
The third free practice at Silverstone saw two red flags in the final ten minutes, bringing the session to an abrupt halt.
—Saajan Jogia, MSNBC Newsweek, 5 July 2025
Watch for common red flags: Be cautious of sudden friend requests from unfamiliar accounts, vague messages that mention surprise winnings, poor grammar or any pressure to act quickly.
—Kurt Knutsson, FOXNews.com, 26 June 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Studies of bike riders six years ago — before the popularity of e-bikes soared — found that between 25% and 79% of bicyclists in the city do not stop for red lights.—
Steve Cohen,
New York Daily News,
13 July 2025
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Acknowledging that the previous iteration of the red-light cameras was a controversial issue, most city leaders felt that fatalities and injuries from recent traffic collisions could’ve been avoided had drivers slowed down or not run red lights.—
Shawn Raymundo,
AZCentral.com,
3 July 2025
Noun
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Parts of Northern Kentucky are under a severe thunderstorm warning until 8:30 p.m. as well.—
David Ferrara,
The Enquirer,
21 July 2025
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But debate rages over the ideal, and safe, extent of integrating AI into other nuclear functions such as early warning, targeting, and communications.—
Davis Winkie,
USA Today,
20 July 2025
Noun
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If the interview starts to feel like a brainstorm, that's a great sign.—
Expert Panel®,
Forbes.com,
10 July 2025
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Then, on July 10, the moon will reach its peak of fullness in the structured and pragmatic sign of Capricorn.—
Valerie Mesa,
People.com,
10 July 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 23 Jul. 2025.
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