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
With red flag conditions forecast through 8 p.m. Thursday, firefighters face winds channeled down local canyons and very low humidity.
—
Tom Tapp, Deadline, 22 Jan. 2025
Meanwhile in Southern California, strong offshore Santa Ana winds have prompted the highest category of red flag warnings for Tuesday.
—Andrew Freedman, Axios, 22 Jan. 2025
But on Monday, the NBA resumes play in Los Angeles while a red flag warning is in place for parts of the city and county, with wind gusts of up to 70 mph forecast between 4 a.m. Tuesday and noon Wednesday.
—Anthony Chiang, Miami Herald, 14 Jan. 2025
Inconsistencies or sudden shifts in accounting methods can raise red flags for investors and regulators.
—Ivan Lunegov, Forbes, 14 Jan. 2025
See all Example Sentences for red flag 
Tom Tapp, Deadline, 22 Jan. 2025
Meanwhile in Southern California, strong offshore Santa Ana winds have prompted the highest category of red flag warnings for Tuesday.
—Andrew Freedman, Axios, 22 Jan. 2025
But on Monday, the NBA resumes play in Los Angeles while a red flag warning is in place for parts of the city and county, with wind gusts of up to 70 mph forecast between 4 a.m. Tuesday and noon Wednesday.
—Anthony Chiang, Miami Herald, 14 Jan. 2025
Inconsistencies or sudden shifts in accounting methods can raise red flags for investors and regulators.
—Ivan Lunegov, Forbes, 14 Jan. 2025
See all Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
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Treatment with red light therapy involves exposure to red light at a very low dose in a hospital or clinic.—
Praveen Arany,
The Conversation,
24 Jan. 2025
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The ordinance also established that motorists were allowed to make right turns at red lights.—
Ryan Fonseca,
Los Angeles Times,
24 Jan. 2025
Noun
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The Clay Fire in Riverside County, near Los Angeles, has ignited on Tuesday evening, growing to nearly 40 acres and prompting evacuation warnings.—
Kristen Waggoner,
Newsweek,
22 Jan. 2025
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Blizzard warnings have even been issued along the Louisiana coastline.—
Abigail Adams,
People.com,
21 Jan. 2025
Noun
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This might be a sign of experiencing imposter syndrome and having a false concern of self-doubt in yourself.—
Lance Eliot,
Forbes,
23 Jan. 2025
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Police have said there was no sign of an intrusion or evidence of murder in his home.—
Raul A. Reyes,
Newsweek,
23 Jan. 2025
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 30 Jan. 2025.
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