red flag
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
One person had to wave a red flag while walking in front of the vehicle to warn horses and pedestrians.
From The Wall Street Journal ● Sep. 13, 2026
Sally, reluctant though she is, immediately connects with the tattooed professor, even if there is a red flag or two waving.
From Los Angeles Times ● Sep. 11, 2026
True, the latter is the ultimate red flag.
From Los Angeles Times ● Sep. 9, 2026
Mercedes called Antonelli for new tyres - a decision they had to make as he had switched to the medium compound at the red flag and that would not make it to the end.
From BBC ● Sep. 6, 2026
House after house was decorated with a tiny red flag, the sign that yellow fever had invaded it.
From "An American Plague: The True and Terrifying Story of the Yellow Fever Epidemic of 1793" by Jim Murphy
