Definition of sister-in-law noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈsɪstər ɪn lɔː//
; NAmE NAmE//ˈsɪstər ɪn lɔː//
(pl. sisters-in-law) Marriage, Relations
jump to other results
the sister of your husband or wife; your brother’s or sister's wife; the wife of your husband or wife’s brother compare brother-in-law See related entries: Marriage, Relations
See the Oxford Advanced American Dictionary entry: sister-in-law