brother-in-law

noun6

1. •
   A male relative of one's generation, separated by one degree of marriage.
2. •
   The husband of one's sibling.
3. •
   Co-brother-in-law: A male relative of one's generation, separated by two degrees of marriage.
4. •
   The husband of the sibling of one's spouse.
5. •
   The brother of one's spouse.
6. •
   The brother of the spouse of one's sibling.