Brother-in-law

Pronunciation

• GenAm IPA: /ˈbɹʌðɚ ɪn ËŒlÉ”/
• cot-caught IPA: /ˈbɹʌðɚ ɪn ËŒlÉ‘/
• RP IPA: /ˈbrʌðəɹ ɪn ËŒlɔː/

Alternative forms

• brother in law

Full definition of brother-in-law

Noun

1. A male relative of one's generation, separated by one degree of marriage:
1. The brother of one's spouse.
2. The husband of one's sibling.
2. (uncommon) Co-brother-in-law: A male relative of one's generation, separated by two degrees of marriage:
1. The husband of the sibling of one's spouse.
2. The brother of the spouse of one's sibling.

Derived terms

• half brother-in-law
• co-brother-in-law

Related terms

• daughter-in-law
• father-in-law
• mother-in-law
• sister-in-law
• son-in-law
• co-wife