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
The residents living in wildfire weather population total is derived from a spatial analysis of 2020 US Census data at the tract level and the boundaries of current National Weather Service fire weather watches and red flag alerts.
—
Matt Stiles,
CNN Money,
30 June 2026
By early Monday afternoon, the weather service had issued red flag warnings for imminent fire danger for large swaths of Colorado between Tuesday afternoon and night.
—
Lauren Penington,
Denver Post,
30 June 2026
The experts say that alone is a red flag.
—
Kelsy Mittauer,
CBS News,
29 June 2026
An earlier ethics complaint was dismissed Immigration attorneys say Lozano’s social media was filled with red flags, like claiming the Virgin Mary blessed all her cases.
—
Jack Brook,
Chicago Tribune,
29 June 2026
See All Example Sentences for red flag
Matt Stiles,
CNN Money,
30 June 2026
By early Monday afternoon, the weather service had issued red flag warnings for imminent fire danger for large swaths of Colorado between Tuesday afternoon and night.
—
Lauren Penington,
Denver Post,
30 June 2026
The experts say that alone is a red flag.
—
Kelsy Mittauer,
CBS News,
29 June 2026
An earlier ethics complaint was dismissed Immigration attorneys say Lozano’s social media was filled with red flags, like claiming the Virgin Mary blessed all her cases.
—
Jack Brook,
Chicago Tribune,
29 June 2026
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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An evacuation warning was issued for the area of Paradise Ranch, between Templin Highway and the Pyramid Lake area, according to Los Angeles County fire officials.
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Burgin initially took the test in November after moving to California from Minnesota and then received the DMV warning letter in June.
Noun
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Indirect talks concluded last week without any sign of meaningful progress toward a lasting peace agreement.
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Neptune goes retrograde in your sign today, and false confidence starts to dissipate!
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 7 Jul. 2026.
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