What is an example of sister-in-law? Sister-in-law is a woman who marries your brother or is your husband’s sister. An example of sister in law is the sister of your brother. (less common) Co-sister-in-law: The wife of one’s sibling-in-law. The wife of the child of one’s spouse.
What do we call sister-in-law? Definition of sister-in-law
1 : the sister of one’s spouse. 2a : the wife of one’s sibling. b : the wife of one’s spouse’s sibling.
What relation is a sister-in-law? Your sister-in-law is the sister of your husband or wife, or the woman who is married to your brother.
Why is it called a sister-in-law? Why is it called sister-in-law? The most famous case was that at one time a man could not marry his deceased wife’s sister or a woman her dead husband’s brother. The sister of a man’s dead wife was considered as much off limits for marriage as if she were his own sister — she was a sister “in law”.