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
That’s a red flag for circulation problems—which are particularly common among people with diabetes—and her office helps patients get scheduled to see a vascular specialist as soon as possible.
—
Angela Haupt, Time, 16 Sep. 2025
It's given Gillispie insight on the importance of intervening in kids' lives in specific ways and early on, from the moment a possible red flag appears.
—Cleo Krejci, jsonline.com, 16 Sep. 2025
And at home, some graduates are finding their experience abroad is raising red flags with employers, who are increasingly casting a suspicious eye over graduates trained at foreign universities worldwide.
—Joyce Jiang, CNN Money, 13 Sep. 2025
Sheriff Tony later condemned his deputies’ failures, including their inaction on removing Nathan’s firearms or seeking a court order under Florida’s red flag law, passed after the 2018 Marjory Stoneman Douglas High massacre.
—Milena Malaver, Miami Herald, 12 Sep. 2025
See All Example Sentences for red flag
Angela Haupt, Time, 16 Sep. 2025
It's given Gillispie insight on the importance of intervening in kids' lives in specific ways and early on, from the moment a possible red flag appears.
—Cleo Krejci, jsonline.com, 16 Sep. 2025
And at home, some graduates are finding their experience abroad is raising red flags with employers, who are increasingly casting a suspicious eye over graduates trained at foreign universities worldwide.
—Joyce Jiang, CNN Money, 13 Sep. 2025
Sheriff Tony later condemned his deputies’ failures, including their inaction on removing Nathan’s firearms or seeking a court order under Florida’s red flag law, passed after the 2018 Marjory Stoneman Douglas High massacre.
—Milena Malaver, Miami Herald, 12 Sep. 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Oxygen emits either a greenish-yellow light (the most familiar color of the aurora) or a red light; nitrogen generally gives off a blue light.—
Jenna Prestininzi,
Freep.com,
16 Sep. 2025
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The blinking red light is obviously kicker Matt Gay, who missed field goal attempts from 58 and 52 yards Thursday.—
Nicki Jhabvala,
New York Times,
15 Sep. 2025
Noun
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Some counties are adding sirens that don’t depend on fragile cell networks to emit warnings, for one.—
Nora O'Neill,
Charlotte Observer,
18 Sep. 2025
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In 2025, announced on September 12, the FDA is once again expanding their warning list to include Jiva organic ground cinnamon, which also contains high levels of the heavy metal.—
Abigail Wilt,
Southern Living,
18 Sep. 2025
Noun
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This narrowing was the unmistakable sign of quantum squeezing.—
Neetika Walter,
Interesting Engineering,
19 Sep. 2025
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Many of the protesters held anti-Trump signs and Palestinian flags.—
David Brennan,
ABC News,
18 Sep. 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 23 Sep. 2025.
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