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
At a press conference Thursday following the teenager's arrest, Kenosha Police Chief Patrick Patton cited the internet searches and video suspect practicing tactics with what appeared to be a rifle as the red flags.
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Ricardo Torres, Journal Sentinel, 12 Nov. 2024
The fire area's remaining red flag fire warnings, which declare conditions are ripe for fast-erupting blazes, expired at 11 a.m. Friday, weather service meteorologist Ryan Kittell said.
—Dennis Romero, NBC News, 9 Nov. 2024
The red flag warning encompassed almost all of the Bay Area, excepting large portions of Sonoma and Marin counties.
—Nollyanne Delacruz, The Mercury News, 7 Nov. 2024
Startups often lack financial planning, which is a massive red flag.
—Nick Bereza, Forbes, 5 Nov. 2024
See all Example Sentences for red flag 
Ricardo Torres, Journal Sentinel, 12 Nov. 2024
The fire area's remaining red flag fire warnings, which declare conditions are ripe for fast-erupting blazes, expired at 11 a.m. Friday, weather service meteorologist Ryan Kittell said.
—Dennis Romero, NBC News, 9 Nov. 2024
The red flag warning encompassed almost all of the Bay Area, excepting large portions of Sonoma and Marin counties.
—Nollyanne Delacruz, The Mercury News, 7 Nov. 2024
Startups often lack financial planning, which is a massive red flag.
—Nick Bereza, Forbes, 5 Nov. 2024
See all Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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The display screen gives real-time air quality levels in the form of green, orange, and red lights, and the machine will automatically adjust its cleaning efficiency based on the air quality in the room.Rachel Trujillo, People.com, 30 Oct. 2024
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The phone rang so frequently that Mintz had to install a second dedicated line in his little house in Laurel Canyon; whenever John or Yoko called, a red light would illuminate.Seth Abramovitch, The Hollywood Reporter, 26 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 1 Dec. 2024.
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