(n.) The brother of one's husband or wife; also, the husband of one's sister; sometimes, the husband of one's wife's sister.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). brother-in-law. Retrieved October 1, 2026, from http://smartdefine.org/brother-in-law/definitions/1982751 |
| Chicago | Webster's. 2011. "brother-in-law" http://smartdefine.org/brother-in-law/definitions/1982751 (accessed October 1, 2026). |
| Harvard | Webster's 2011, brother-in-law, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/brother-in-law/definitions/1982751>. |
| MLA | Webster's. "brother-in-law" 27 May 2011. Web. 1 October 2026. <http://smartdefine.org/brother-in-law/definitions/1982751> |