One entry found for sister-in-law.
Main Entry: sis·ter-in-law
Pronunciation: sis-t(-)rn-l, -trn-l
Function: noun
Inflected Form(s): plural sis·ters-in-law /-tr-zn-/ 1: the sister of one's spouse 2 a: the wife of one's brother b: the wife of one's spouse's brother