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.

That was a huge red flag for me that we had to dig deeper.

From Los Angeles Times • May 20, 2026

As for the second red flag, weak data points, Allen noted that previous energy shocks have been accompanied by evidence such as the sharp and immediate rise in unemployment in 1973.

From MarketWatch • May 19, 2026

Footage of the crash site on other days showed vehicles stopped on the track, with officials raising the red flag to signal to oncoming trains to stop until the traffic cleared, he said.

From Barron's • May 18, 2026

Another major red flag about the website, advocates say, is that the website directs people to unregulated pregnancy clinics.

From Salon • May 17, 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