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
The National Weather Service has issued a red flag warning for strong winds and low humidity from 10 a.m. until 7 p.m. Saturday.
—
Todd Karpovich, Baltimore Sun, 1 Mar. 2025
The two had surprisingly little trouble in their time together, seeming to blend in their lives pretty seamlessly and with no big red flags when meeting family, either.
—Lissete Lanuza Sáenz, StyleCaster, 28 Feb. 2025
High temperatures are not part of the requirements for a red flag warning, which are issued by the National Weather Service year-round.
—Christopher Cann, USA TODAY, 28 Feb. 2025
One of the first ‘red flags’ to appear at the original Fyre Festival was when one of its main acts, Blink-182, had dropped off the festival last minute.
—Quentin Thane Singer, Forbes, 26 Feb. 2025
See All Example Sentences for red flag
Todd Karpovich, Baltimore Sun, 1 Mar. 2025
The two had surprisingly little trouble in their time together, seeming to blend in their lives pretty seamlessly and with no big red flags when meeting family, either.
—Lissete Lanuza Sáenz, StyleCaster, 28 Feb. 2025
High temperatures are not part of the requirements for a red flag warning, which are issued by the National Weather Service year-round.
—Christopher Cann, USA TODAY, 28 Feb. 2025
One of the first ‘red flags’ to appear at the original Fyre Festival was when one of its main acts, Blink-182, had dropped off the festival last minute.
—Quentin Thane Singer, Forbes, 26 Feb. 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Balde, 24, was traveling through a steady red light, police said.—
Rocco Parascandola,
New York Daily News,
18 Feb. 2025
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The space has been decorated with red lights and pillows as a nod to the new product.—
Hikmat Mohammed,
WWD,
18 Feb. 2025
Noun
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The other recent Google change that now comes into play (no pun intended) is Play Store’s quality warnings, which focus on poor reviews and uninstalls amongst other things.—
Zak Doffman,
Forbes,
26 Feb. 2025
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The warning about the security measures put in place were posted on the naval base’s Facebook page.—
Washington Examiner Staff,
Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government,
26 Feb. 2025
Noun
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These signs include avoiding each other or keeping their distance, swiping, biting, dilated pupils, flattened ears, hissing, litter box guarding, urinating outside of the litter box, territorial aggression, and toy hoarding.—
Dan Perry,
Newsweek,
28 Feb. 2025
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Each sign rules different parts of the body, and Aries rules the head.—
Sophie Saint Thomas,
Allure,
28 Feb. 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 6 Mar. 2025.
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