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
Why gift cards are a major warning sign Gift cards are one of the biggest red flags in scams.
—
Kurt Knutsson, FOXNews.com, 17 Apr. 2026
What’s good for United could be a downer for travelers, and traditionally, anything that shrinks the list of rivals linking the same two metros from a longer roster to just one or two raises red flags for regulators.
—Shawn Tully, Fortune, 17 Apr. 2026
Which is a weird red flag, right?
—Laura House, Los Angeles Times, 17 Apr. 2026
Two red flags mean the water is closed to the public.
—Irene Wright, USA Today, 17 Apr. 2026
See All Example Sentences for red flag
Kurt Knutsson, FOXNews.com, 17 Apr. 2026
What’s good for United could be a downer for travelers, and traditionally, anything that shrinks the list of rivals linking the same two metros from a longer roster to just one or two raises red flags for regulators.
—Shawn Tully, Fortune, 17 Apr. 2026
Which is a weird red flag, right?
—Laura House, Los Angeles Times, 17 Apr. 2026
Two red flags mean the water is closed to the public.
—Irene Wright, USA Today, 17 Apr. 2026
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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And that was supposed to be one of the Game 2 warnings.—
C.J. Holmes,
New York Daily News,
21 Apr. 2026
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Reports of a crash on southbound US-169 South A traffic warning has been issued after a crash on US-169 South between US-69 South and US-69 North.—
Kansas City Star,
Kansas City Star,
20 Apr. 2026
Noun
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Counsell thought Suzuki’s at-bats looked good from the onset of Tuesday’s game and felt the swings in his first at-bat were a great sign.—
Meghan Montemurro,
Chicago Tribune,
22 Apr. 2026
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As the Moon meets Jupiter in your sign, your presence carries weight and people respond to your tone.—
Tarot.com,
New York Daily News,
22 Apr. 2026
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 23 Apr. 2026.
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