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English definition of “brother-in-law”

brother-in-law

noun [C]
 
 
/ˈbrʌðərɪnlɔː/ (plural brothers-in-law)
B2 the man married to your sister, or the brother of your husband or wifeFamily relations in general
(Definition of brother-in-law from the Cambridge Learners Dictionary © Cambridge University Press)
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