brother-in-law

noun broth·er-in-law \ ˈbrə-t͟hər-ən-ˌlȯ , ˈbrət͟h-rən- , ˈbrə-t͟hərn- \

Definition of brother-in-law

plural brothers-in-law play \ˈbrə-t͟hərz-ən-\
1 : the brother of one's spouse
2 a : the husband of one's sibling
b : the husband of one's spouse's sibling

First Known Use of brother-in-law

14th century

in the meaning defined at sense 1

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BROTHER-IN-LAW Defined for English Language Learners

brother-in-law

Definition of brother-in-law for English Language Learners

  • : the brother of your husband or wife

  • : the husband of your sister


BROTHER-IN-LAW Defined for Kids

brother-in-law

noun broth·er-in-law \ ˈbrə-t͟hər-ən-ˌlȯ \

Definition of brother-in-law for Students

plural brothers-in-law
1 : the brother of a person's husband or wife
2 : the husband of a person's sister


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