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Definition of black flag noun from the Oxford Advanced Learner's Dictionary

black flag

noun

/ˌblæk ˈflæɡ/

/ˌblæk ˈflæɡ/

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a black flag used in motor racing to stop a driver who has done something wrong

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a flag with a skull and crossbones on it

See black flag in the Oxford Advanced American Dictionary

Check pronunciation: black flag

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