( red flags)
1.
A red flag is a flag that is red in colour and is used as a symbol to represent communism and socialism or to indicate danger or as a sign that you should stop.
Then the rain came and the red flag went up to signal a halt.
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2.
If you refer to something as a red flag , you mean that it acts as a danger signal.
The abnormal bleeding is your body’s own red flag of danger.
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