co-sisternoun [ C ]
uk/ˈkəʊˌsɪs.tər/us/ˈkoʊˌsɪs.tɚ/Indian Englishthe wife of your husband's brother
Thesaurus: synonyms and related words
Family: non-blood relations
- auntie
- brother-in-law
- co-brother
- daughter-in-law
- father-in-law
- goddaughter
- godfather
- godmother
- godparent
- godson
- sister-in-law
- son-in-law
- step
- stepbrother
- stepchild
- stepfamily
- stepfather
- stepmother
- stepmum
- stepparent
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