A brother-in-law (plural brothers-in-law) is the brother of one's spouse, the husband of one's sibling, or sometimes the husband of one's spouse's sibling.[1][2] Relative to a man, the latter case (typically his wife's sister's husband; that is, the two men have married sisters) is occasionally called a co-brother-in-law, as they are each the brother-in-law of the other's wife.
For example, if Brenda and Irene are sisters, Joe is Brenda's husband, and Jason is Irene's husband, then Joe is Irene's brother-in-law, Jason is Brenda's brother-in-law, and Joe and Jason are co-brothers-in-law to one another.
The Wiktionary definition of brother-in-lawTemplate:Incomplete
A brother by marriage
A person's brother-in-law is his/her sister's husband, or spouse's brother.
There is some debate over whether the husband of a person's sister-in-law is "brother-in-law" or "brother-in-law by marriage". Most legal definitions indicate such a person is a "brother-in-law". However the term "brother-in-law by marriage" may provide useful clarification.
The plural form is "brothers-in-law".
| This page uses content from the English language Wikipedia. The original content was at Brother-in-law. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License. |
A brother-in-law is the brother of someone's wife or husband. A brother-in-law is also someone's sister's husband.
   | ''m-w.com'' entry - brother-in-law - Definition from the Merriam-Webster Online Dictionary |
| | AllWords.com dictionary definition - Definition of brother-in-law |
| | reference.com dictionary entry - brother-in-law definition | Dictionary.com |
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