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sister–in–law
noun sis·ter–in–law \ˈsis-t(ə-)rən-ˌlȯ, -tərn-ˌlȯ\
: the sister of your husband or wife
: the wife of your brother
plural sis·ters–in–law \-tər-zən-\
Full Definition of SISTER-IN-LAW
1
: the sister of one's spouse
2
a : the wife of one's brother b : the wife of one's spouse's brother
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First Known Use of SISTER-IN-LAW
15th century
SISTERS-IN-LAW Defined for Kids
sister–in–law
noun sis·ter–in–law \ˈsi-stər-ən-ˌlȯ\
plural sis·ters–in–law
Definition of SISTER-IN-LAW for Kids
1
: the sister of someone's husband or wife
2
: the wife of someone's brother
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