Definition of blood brother noun from the Oxford Advanced Learner's Dictionary


blood brother

BrE BrE//ˈblʌd brʌðə(r)//
; NAmE NAmE//ˈblʌd brʌðər//
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a man who has promised to treat another man as his brother, usually in a ceremony in which their blood is mixed together
See the Oxford Advanced American Dictionary entry: blood brother