# sister-in-law

> English word · Noun · IPA /ˈsɪs.tɚ.ɪn.lɔ/

## Definitions
1. A female relative of one's generation, separated by one degree of marriage:
2. A female relative of one's generation, separated by one degree of marriage:
3. Co-sister-in-law: The wife of one's sibling-in-law.
4. Co-sister-in-law: The wife of one's sibling-in-law.

## Etymology
Inherited from Middle English suster-in-lawe; equivalent to sister + -in-law.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sister-in-law