sister-in-lawnoun [ C ]
uk/ˈsɪs.tə.rɪn.lɔː/us/ˈsɪs.tɚ.ɪn.lɑː/plural sisters-in-lawB2 the wife of your brother or sister, or the sister of your husband or wife, or the wife of the brother or sister of your husband or wife
Thesaurus: synonyms and related words
Family: non-blood relations
- auntie
- brother-in-law
- co-brother
- co-sister
- daughter-in-law
- godchild
- goddaughter
- godfather
- godmother
- godparent
- mother-in-law
- son-in-law
- step
- stepbrother
- stepchild
- stepfamily
- stepfather
- stepmother
- stepmum
- stepparent
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