SISTER-IN-LAW

A sister by marriage.
A person's 'sister-in-law' is his/her brother's wife, or spouse's sister.
There is some debate over whether the wife of a person's brother-in-law is "sister-in-law" or "sister-in-law by marriage", however, most legal definitions indicate that a sibling through marriage is a "brother-in-law" or "sister-in-law".
The plural form is "sisters-in-law".

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See also

See also

★ Affinity (law)

★ Brother-in-law