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
This combination of inflation, slowing economic growth and market instability is a red flag for anyone who depends on their investments for retirement income.
—
David Abreu, Forbes.com, 3 June 2025
This is another red flag, as Toshiba’s website says its Canvio portable HDDs only go up to 4TB.
—ArsTechnica, 3 June 2025
Its angular design leans midcentury modern and the sleek-looking red flag plays with proportion in a visually intriguing way.
—Blake Bakkila, Architectural Digest, 3 June 2025
Understanding the gravity of a red flag warning and adhering to these precautions is paramount in averting wildfires during these perilous conditions.
—Ca Weather Bot, Sacbee.com, 1 June 2025
See All Example Sentences for red flag
David Abreu, Forbes.com, 3 June 2025
This is another red flag, as Toshiba’s website says its Canvio portable HDDs only go up to 4TB.
—ArsTechnica, 3 June 2025
Its angular design leans midcentury modern and the sleek-looking red flag plays with proportion in a visually intriguing way.
—Blake Bakkila, Architectural Digest, 3 June 2025
Understanding the gravity of a red flag warning and adhering to these precautions is paramount in averting wildfires during these perilous conditions.
—Ca Weather Bot, Sacbee.com, 1 June 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Witnesses said that Pelkey was at a red light when Horcasitas pulled up behind him in a Volkswagen.—
Saleen Martin,
USA Today,
10 May 2025
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On the topic of disparities, Barone said over the last 10 years the numbers show when police use the traffic laws to focus on violations that are killing people like speeding, following too closely, running stop signs or red lights there is little disparity in the data.—
Sean Krofssik,
Hartford Courant,
9 May 2025
Noun
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The orders were later reduced to warnings, and the last of the warnings was lifted about 8:30 p.m. Sunday.—
David Garrick,
San Diego Union-Tribune,
2 June 2025
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The warning is in effect until 11 p.m. How to react when facing a lightning hazard?—
KANSAS CITY STAR WEATHER BOT,
Kansas City Star,
1 June 2025
Noun
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To some, the shift may vindicate Trump's America First strategy — a sign that pressuring allies to increase defense spending is working.—
Scott Neuman,
NPR,
4 June 2025
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The inspector also cited four separate hand-washing violations, including sinks without soap or paper towels, one lacking a required sign and another used to store a sanitizer bucket.—
Zach Everson,
Forbes.com,
4 June 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 10 Jun. 2025.
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