sister-in-law
noun
- female sibling-in-law
Wiktionary
Pronunciation: /ˈsɪs.tɚ.ɪn.lɔ/ / /ˈsɪs.tə.ɪn.lɔː/
noun
Etymology: Inherited from Middle English suster-in-lawe; equivalent to sister + -in-law.
- A female relative of one's generation, separated by one degree of marriage:
“Though they are not twins, my sister-in-law resembles my wife in almost every way.”
- A female relative of one's generation, separated by one degree of marriage:
“My sister-in-law and my brother met while they were both on vacation in Jamaica.”
- Co-sister-in-law: The wife of one's sibling-in-law.
- Co-sister-in-law: The wife of one's sibling-in-law.