yellow flag
Americannoun
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another name for quarantine flag
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See flag 3
Etymology
Origin of yellow flag
First recorded in 1775–85
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 may seem like a small change, but it’s a yellow flag for people who follow these things closely.
From MarketWatch ● Aug. 19, 2026
Russell insisted he had slowed sufficiently for the Verstappen incident, and said there was just a single yellow flag showing, rather than the double waved yellows which might have been expected for such a situation.
From BBC ● Jun. 27, 2026
One yellow flag is grid operators spending beyond their means on green transformation, warns Nadege Tillier, head of corporate credit research at ING.
From Barron's ● May 27, 2026
Rosenqvist’s three-second lead was erased when debris on the track exiting the Aquarium Fountain drew the only yellow flag all afternoon and narrowed the gap.
From Los Angeles Times ● Apr. 19, 2026
‘You dressed in black,’ Nico noted, ‘with the sun coming up. You painted your face but didn’t cover that mop of blond hair. You might as well be waving a yellow flag.’
From "Blood of Olympus" by Rick Riordan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
