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
Across the Bay Area and Central Coast, a red flag warning will be in effect Tuesday through Thursday, with gusts averaging from 25 to 50 mph.
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Grace Toohey, Los Angeles Times, 4 Nov. 2024
Farther west, red flag warnings are active in the Texas panhandle as well as a swath covering eastern Colorado, northwestern Kansas, southern Nebraska and southwestern Iowa.
—Chad Murphy, The Enquirer, 30 Oct. 2024
Her son wrote a lengthy letter detailing the red flags from her relationship and information about scams.
—Daryl Perry, The Indianapolis Star, 30 Oct. 2024
But that wasn’t the only red flag neighbors noticed: Police were contacted twice throughout 2022 out of concern for Franke’s children.
—Lynsey Eidell, People.com, 27 Oct. 2024
See all Example Sentences for red flag 
Grace Toohey, Los Angeles Times, 4 Nov. 2024
Farther west, red flag warnings are active in the Texas panhandle as well as a swath covering eastern Colorado, northwestern Kansas, southern Nebraska and southwestern Iowa.
—Chad Murphy, The Enquirer, 30 Oct. 2024
Her son wrote a lengthy letter detailing the red flags from her relationship and information about scams.
—Daryl Perry, The Indianapolis Star, 30 Oct. 2024
But that wasn’t the only red flag neighbors noticed: Police were contacted twice throughout 2022 out of concern for Franke’s children.
—Lynsey Eidell, People.com, 27 Oct. 2024
See all Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Officials said the Uber driver stopped at a red light and began praying in Arabic.Filip Timotija, The Hill, 31 Oct. 2024
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The downtown restaurant-meets-club was transformed for one night only into a multi-floor party venue bathed in deep red light.Freya Drohan, Vogue, 29 Oct. 2024
Noun
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Weather conditions triggered red flag warnings Tuesday in the Northeast and firefighters in California continued to battle a large wildfire that has burned over 20,000 acres.Minyvonne Burke, NBC News, 13 Nov. 2024
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After a dry week marked by red flag warnings signaling fire danger and the threat of power shutoffs for some, rain was forecast to shower the Bay Area on and off through the end of the week.Nollyanne Delacruz, The Mercury News, 11 Nov. 2024
Noun
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According to the Cleveland Clinic, more noticeable signs of contamination are visible mold spots, an unpleasant smell, cloudy water, or an off-putting taste.Kayla Blanton, Outside Online, 17 Nov. 2024
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But one of the team’s top prospects, defenseman Owen Pickering, was just recalled from the AHL, a sign that the Pens want to get younger.Curtis Pashelka, The Mercury News, 16 Nov. 2024
Thesaurus Entries Near red flag
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 21 Nov. 2024.
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