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
For Goodwin, a lack of motivation is a workplace red flag.
—
Ashton Jackson
natalie Wu, CNBC, 29 Oct. 2025
The absence of either can and should feel like a big red flag to drinkers.
—Oset Babür-Winter, Bon Appetit Magazine, 29 Oct. 2025
Airbnb’s cofounder and CEO Brian Chesky is one the most outspoken leaders in the business world waving the red flag on loneliness.
—Emma Burleigh, Fortune, 29 Oct. 2025
Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in mitigating the risk of wildfires during these perilous conditions.
—Ca Weather Bot, Sacbee.com, 29 Oct. 2025
See All Example Sentences for red flag
Ashton Jackson
natalie Wu, CNBC, 29 Oct. 2025
The absence of either can and should feel like a big red flag to drinkers.
—Oset Babür-Winter, Bon Appetit Magazine, 29 Oct. 2025
Airbnb’s cofounder and CEO Brian Chesky is one the most outspoken leaders in the business world waving the red flag on loneliness.
—Emma Burleigh, Fortune, 29 Oct. 2025
Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in mitigating the risk of wildfires during these perilous conditions.
—Ca Weather Bot, Sacbee.com, 29 Oct. 2025
See All Example Sentences for red flag
Recent Examples of Synonyms for red flag
Noun
-
In Missouri, the Kansas City Council approved an ordinance Thursday to prohibit drivers from making right turns on red lights in school zones during school zone hours, requiring signs at intersections and allowing schools to request waivers if pick-up and drop-off is disrupted by the rule change.—
PJ Green
November 11,
Kansas City Star,
11 Nov. 2025
-
Oxygen emits either a greenish-yellow light (the most familiar color of the aurora) or a red light; nitrogen generally gives off a blue light.—
Jenna Prestininzi,
Freep.com,
11 Nov. 2025
Noun
-
The impact of the storm was worsened by clogged waterways in an already flood-prone area, and an apparent lack of understanding of early warnings, Bernardo Rafaelito Alejandro IV, deputy administrator for the Philippines Office of Civil Defense told local media.—
Helen Regan,
CNN Money,
6 Nov. 2025
-
Strong winds are occurring but are not so strong as to warrant a High wind warning.—
CA Weather Bot,
Sacbee.com,
6 Nov. 2025
Noun
-
Trade discussions dominated those meetings, but there were signs of growing tensions over Beijing’s surging conventional and nuclear arsenal.—
Tamara Qiblawi,
CNN Money,
7 Nov. 2025
-
However, unlike last season, there was no sign to those within the Capitals that their captain was feeling the pressure of scoring another historic goal.—
Sean Gentille,
New York Times,
6 Nov. 2025
Cite this Entry
“Red flag.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20flag. Accessed 20 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share