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
Rates below 10 to 12 percent raise immediate red flags about list decay or inflated subscriber numbers.
—
Lien De Pau, Forbes.com, 18 May 2026
Another round of red flag warnings was forecast for the southern state on Monday .
—Lauren Penington, Denver Post, 17 May 2026
Emilia’s tentativeness around her father is a red flag, and so is the fact that the two haven’t seen each other for 13 years.
—Owen Gleiberman, Variety, 16 May 2026
The spokesperson also confirmed that a red flag warning was in place at the time, meaning swimming was extremely dangerous.
—Gabrielle Rockson, PEOPLE, 13 May 2026
See All Example Sentences for red flag
Lien De Pau, Forbes.com, 18 May 2026
Another round of red flag warnings was forecast for the southern state on Monday .
—Lauren Penington, Denver Post, 17 May 2026
Emilia’s tentativeness around her father is a red flag, and so is the fact that the two haven’t seen each other for 13 years.
—Owen Gleiberman, Variety, 16 May 2026
The spokesperson also confirmed that a red flag warning was in place at the time, meaning swimming was extremely dangerous.
—Gabrielle Rockson, PEOPLE, 13 May 2026
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
-
Evacuation orders and warnings have been issued in the area.—
Paris Barraza,
USA Today,
19 May 2026
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The warning was active for Eastern Sierra Slopes of Inyo County, White Mountains of Inyo County, Death Valley, Owens Valley South and Owens Valley North.—
CA Weather Bot,
Sacbee.com,
18 May 2026
Noun
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He’s gone from being a disposable asset in Vegas, which shipped him to Toronto in a sign-and-trade for Mitch Marner on July 1, to being coveted in Colorado at the trade deadline when the Avs acquired him to be their third-line center.—
Nate Peterson,
Denver Post,
19 May 2026
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The initial investigation into the billionaire’s death by Spanish authorities was closed in January 2025, and deemed an accident with no signs of any criminal wrongdoing.—
Rosemary Feitelberg,
Footwear News,
19 May 2026
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 22 May. 2026.
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