yellow flag

American  

noun

1. Nautical. quarantine flag.

2. water flag.

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yellow flag British  

noun

1. another name for quarantine flag

2. See flag 3

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Etymology

Origin of yellow flag

First recorded in 1775–85

Example Sentences

The yellow flag of the Iran-backed armed group was hanging on top of a pile of rubble in the northeastern town of Younine.

From BBC

Protesters holding red, black, and yellow flags converged on the main square.

From Barron's

“There are more yellow flags appearing than disappearing for the AI trade, but they do not yet reach the level that makes me bearish on the markets or bearish on AI,” says Hazen.

From The Wall Street Journal

The red flag with central yellow star stayed official in the home country, while the Southern yellow flag with three red stripes became a refugee reminder in the United States.

From Salon

But if that should fall to the S&P 500 median of 10 times, it “would raise a yellow flag that debt payments are becoming burdensome,” says Emanuel.

From MarketWatch