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
-
Listen to this article Loading your audio article A drunk motorist who ran a red light and killed a pedestrian while driving more than 70 mph through a Brooklyn intersection has been sentenced to three to nine years in prison.—
Leonard Greene,
New York Daily News,
28 Feb. 2025
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During his escape, Conyers ran a red light at Parker Road and Lincoln Avenue and fatally struck pedestrian Jossy Fernando Pinto, 51.—
Max Levy,
The Denver Post,
28 Feb. 2025
Noun
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Ultimately, Sweden was granted an exemption from the ban in exchange for stricter warning labels.—
Carrie Battan,
The New Yorker,
10 Mar. 2025
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Heeding several tornado warnings from the National Weather Service that pinged on their cell phones just after 8:30 a.m., the unnamed couple quickly sought shelter in a safe room in a corner of their home, county officials said.—
Martin E. Comas,
Orlando Sentinel,
10 Mar. 2025
Noun
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Then, when Mars moved into your sign, emotional layers resurfaced.—
Colin Bedell,
Them,
28 Feb. 2025
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That includes preliminary trade data showing a record surge of goods imported into the U.S. — a sign of businesses bringing things in early to get ahead of the administration's tariff threats.—
Axios,
Axios,
28 Feb. 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 14 Mar. 2025.
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