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
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of red flag
And perhaps the greatest example of emotion trumping logic came on challenge plays, as LaFleur went 1-6 when throwing his red flag.
—
Rob Reischel, Forbes.com, 23 July 2025
While red flags were posted on nearby sections of the beach, her lawsuit alleges the city should have known the entire area was unfit for swimming.
—Tresa Baldas, Freep.com, 21 July 2025
So the American dollar so far in 2025 falling in value by around 3 cents, or 5 percent, against the Canadian loonie due to the chaos around Trump’s global trade war is suddenly raising red flags as trends shift.
—Etan Vlessing, HollywoodReporter, 21 July 2025
Skeptics raise red flags Bitcoin's sharp rally has drawn caution from some corners of the market.
—Niket Nishant, USA Today, 12 July 2025
See All Example Sentences for red flag
Rob Reischel, Forbes.com, 23 July 2025
While red flags were posted on nearby sections of the beach, her lawsuit alleges the city should have known the entire area was unfit for swimming.
—Tresa Baldas, Freep.com, 21 July 2025
So the American dollar so far in 2025 falling in value by around 3 cents, or 5 percent, against the Canadian loonie due to the chaos around Trump’s global trade war is suddenly raising red flags as trends shift.
—Etan Vlessing, HollywoodReporter, 21 July 2025
Skeptics raise red flags Bitcoin's sharp rally has drawn caution from some corners of the market.
—Niket Nishant, USA Today, 12 July 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
-
Derrick John Thompson was given consecutive sentences totaling nearly 59 years in prison Thursday for running a red light at more than 100 mph in south Minneapolis and crashing into a sedan, killing five young women.—
Nick Ferraro,
Twin Cities,
25 July 2025
-
Irvine police investigators determined that a Honda Civic turned right on a red light onto Culver Drive, forcing a Toyota Corolla already in the intersection to swerve.—
Sydney Barragan,
Oc Register,
4 July 2025
Noun
-
The warning is in effect until 7 p.m. Actions to take when lightning threat is imminent Around 25 million lightning strikes occur in the United States every year, with most taking place during the summer months.—
NC Weather Bot,
Charlotte Observer,
1 Aug. 2025
-
Russian forces may soon be able to launch 1,000 to 2,000 drones per day, according to recent warnings issued by the Institute for the Study of War think tank and German Maj. Gen. Christian Freuding.—
David Brennan,
ABC News,
1 Aug. 2025
Noun
-
Yellow leaves are a sign of several issues that can occur when growing cucumbers, from watering issues to too much sun.—
Karen Brewer Grossman,
Southern Living,
22 July 2025
-
If the description feels vague, overly broad, or reads like a copy-paste from a generic template, that could be a sign the posting isn’t tied to a real opening.—
Kara Dennison,
Forbes.com,
22 July 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 5 Aug. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share