sister-in-law

Sister-in-law is a woman who marries your brother or is your husband's sister.

(noun)

An example of sister in law is the sister of your brother.

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See sister-in-law in Webster's New World College Dictionary

noun pl. sisters-in-law

  1. the sister of one's husband or wife
  2. the wife of one's brother
  3. the wife of the brother of one's husband or wife

See sister-in-law in American Heritage Dictionary 4

noun pl. sis·ters-in-law (sĭsˈtərz-)
  1. The sister of one's spouse.
  2. The wife of one's brother.
  3. The wife of the brother of one's spouse.

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