Meaning of “black and blue” in the English Dictionary

british dictionary

"black and blue" in British English

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black and blue

with dark marks on your skin caused by being hit or having an accident:

His arm was black and blue.

(Definition of “black and blue” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"black-and-blue" in American English

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black-and-blueadjective

/ˈblæk·ənˈblu/

(of skin) have dark marks as a result of injury:

The fall left her leg all black-and-blue.

(Definition of “black-and-blue” from the Cambridge Academic Content Dictionary © Cambridge University Press)