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
An acquisition right before a sale creates integration risk and raises business buyer red flags.
—
Lien De Pau,
Forbes.com,
20 June 2026
Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in reducing the risk of wildfires during these hazardous conditions.
—
Ca Weather Bot,
Sacbee.com,
19 June 2026
But last week, a Texas judge decided to wave away a pretty clear red flag.
—
Jemele Hill,
The Atlantic,
19 June 2026
There are red flag fire warnings across Northern California, Oregon, Idaho, Nevada, Utah and Arizona, according to the National Weather Service.
—
Bloomberg,
Mercury News,
19 June 2026
See All Example Sentences for red flag
Lien De Pau,
Forbes.com,
20 June 2026
Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in reducing the risk of wildfires during these hazardous conditions.
—
Ca Weather Bot,
Sacbee.com,
19 June 2026
But last week, a Texas judge decided to wave away a pretty clear red flag.
—
Jemele Hill,
The Atlantic,
19 June 2026
There are red flag fire warnings across Northern California, Oregon, Idaho, Nevada, Utah and Arizona, according to the National Weather Service.
—
Bloomberg,
Mercury News,
19 June 2026
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
-
Topical hormone treatments like vaginal estrogen, from which the FDA recently removed a warning label, are becoming commonplace.
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This will be elevated to an extreme heat warning by Monday or Tuesday, and cooling centers will be opened.
Noun
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The housing bill, formally called the 21st Century ROAD to Housing Act, can still become law if Trump neither signs it nor vetoes it in 10 days, excluding Sundays.
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There are signs all around Preston Hollow opposing the project.
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 30 Jun. 2026.
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