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Meaning of sister-in-law

sis•ter-in-law

Pronunciation: (sis'tur-in-lô"), [key]
— pl. sis•ters-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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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