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
Body language expert says New Orleans terrorist exhibited 'red flags' before attack.
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Fox News, 13 Jan. 2025
Deadly wildfires have left parts of Southern California devastated -- and the danger is not over, with more windy weather predicted and red flag warnings extended through Wednesday.
—Geoffrey Eisler, ABC News, 12 Jan. 2025
Though winds diminished slightly on Thursday, much of Los Angeles County remained under a red flag warning, with forecasters cautioning against critical fire weather through Friday night.
—Hannah Fry, Los Angeles Times, 10 Jan. 2025
Participating anglers must bring their own bright red flags, (1 foot in diameter or larger) to hang on fishing shanties, according to the DNR.
—Tanya Wildt, Detroit Free Press, 31 Dec. 2024
See all Example Sentences for red flag 
Fox News, 13 Jan. 2025
Deadly wildfires have left parts of Southern California devastated -- and the danger is not over, with more windy weather predicted and red flag warnings extended through Wednesday.
—Geoffrey Eisler, ABC News, 12 Jan. 2025
Though winds diminished slightly on Thursday, much of Los Angeles County remained under a red flag warning, with forecasters cautioning against critical fire weather through Friday night.
—Hannah Fry, Los Angeles Times, 10 Jan. 2025
Participating anglers must bring their own bright red flags, (1 foot in diameter or larger) to hang on fishing shanties, according to the DNR.
—Tanya Wildt, Detroit Free Press, 31 Dec. 2024
See all Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Tran then ran a red light and fled home to Yonkers.Graham Rayman, New York Daily News, 14 Jan. 2025
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Ebony Coleman, 37, opted for a microneedling treatment paired with red light therapy, and while the experience was initially promising, things soon changed.Yaakov Katz, Newsweek, 13 Jan. 2025
Noun
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Additionally, a freeze warning has been issued by the National Weather Service, and a cold front is expected to cause freezing temperatures.Eric Lagatta, USA TODAY, 9 Jan. 2025
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Wildfire evacuations in Southern California Evacuation orders or warnings were issued for tens of thousands of residents near the major fires in the region.Caitlin O'Kane, CBS News, 9 Jan. 2025
Noun
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In a sign that demand for high-end listings will quickly outpace supply, Eckardt hosted showings on Thursday for four rental properties.Tatiana Siegel, Variety, 11 Jan. 2025
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Temporary help services have been adding jobs for the past two months after a long and precipitous slide, in a potential sign that employers are bringing on contingent labor to address surges in demand.Lydia DePillis, New York Times, 10 Jan. 2025
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 18 Jan. 2025.
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