# brother-in-law

> English word · Noun · IPA /ˈbɹʌðɚ ɪn ˌlɔ/

## Definitions
1. A male relative of one's generation, separated by one degree of marriage:
2. A male relative of one's generation, separated by one degree of marriage:
3. Co-brother-in-law: A male relative of one's generation, separated by two degrees of marriage:
4. Co-brother-in-law: A male relative of one's generation, separated by two degrees of marriage:

## Etymology
From Middle English brother-in-lawe; equivalent to brother + -in-law.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/brother-in-law