I have looked up the definition in several online dictionaries & I think the answer is yes.
http://en.wikipedia.org/wiki/Sister_in_law
http://dictionary.reference.com/browse/Sister-in-law
http://dictionary.cambridge.org/define.asp?key=73956&dict=CALD
http://www.merriam-webster.com/dictionary/sister-in-law
My own Father in law thinks it can only be the wife of your brother, or the sister of your husband but these references disagree, so I call my husband's brother's wife my sister in law.
Hope that helps
No. You husband is your sister's brother-in-law but in the English-speaking cultures he is not related to your sister's husband. However, your sister's husband is yourbrother-in-law.
Your sister's husband's brother is not related to you. He is your sister's brother-in-law or, if you prefer, your brother-in-law's brother. If he is nice, he can be just as much part of the family as everyone else.
Your husband's brother is your brother-in-law, but is not related to your sister.
Yes, your sister's husband is your brother-in-law.
Yes, your sister's husband is your brother-in-law.
Your spouse's brother is also your brother-in-law.
Your sister's husband is your brother-in-law. He is not related to your husband.
Her husband would be your brother-in-law.
Yes, he is.
My husband's sister-in-law or my brother-in-law's wife. She is in no legal relation to you.Most people would just refer to her as your SIL as well, but technically she's just your husband's sister-in-law or your brother-in-law's wife.
There would be no relationship as you do not share a common ancestor. If your brother-in-law is married to your sister, then her daughter is your niece, her husband would be referred to as your niece's husband.
Your sister's husband is your brother-in-law.
Since your sister married a woman then her mate would be your husbands sister-in-law. However, if the woman your sister met dresses and acts like a man and your sister's mate requests it then she would be your husband's brother-in-law.
Yes, your sister's husband is your brother-in-law, as is your wife's brother.
No. Your husband's brother-in-law would be your brother or the husband of your husband's sister. Your sister is your husband's sister-in-law. Your sister's husband is your brother-in-law but the English language has no term to describe a relationship between your husband and your sister's husband. In everyday English usage, however, your sister's husband is referred to as your husband's brother-in-law, yes. But it isn't exactly correct.
sister
You would call your sister's husband your brother-in-law.
In the cultures based on the European languages, your wife's sister is your sister-in-law. Her husband is not related to you. In India, a wife's sister's husband may be called "Co-Brother."
Your husband's brother is your brother-in-law but his wife is not related to you.
The relative of someone who is married into your family is never of any relation to you. So you sister's husband's cousin is not related to you in any way. Which, of course, is not to say that they can't feellike family.
He would be your brother-in-law. To your children, he would be their Uncle.