- the sister of one's husband or wife.
- the wife of one's brother.
- the wife of the brother of one's husband or wife.
Origin of sister-in-law
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sister-in-law
Just a week after her divorce, she was invited to a wedding by her sister-in-law.A Sunni-Shia Love Story Imperiled by al Qaeda
December 26, 2014
Your sister-in-law is kinder and truly taken aback that you look “so healthy!”How to Make It Through Thanksgiving Alive
November 26, 2014
It appears that Jay Z has finally found his 100th problem, and it is his sister-in-law.The Video of Solange Attacking Jay Z Is Deeply Upsetting and Also Fantastic
May 12, 2014
His brother and sister-in-law (Garrett Dillahunt and Kate Walsh) hate each other.Courteney Cox Gets Personal About Her Directorial Debut, ‘Just Before I Go’
April 29, 2014
One week after that attack, her brother, sister, and sister-in-law were killed by a mortar shell fired by the Syrian military.Obama Administration Stiffs Chemical Survivors on New Claim
Josh Rogin, Noah Shachtman
February 20, 2014
"Well, I'm not going to beat about the bush," continued her sister-in-law abruptly.Dust
Mr. and Mrs. Haldeman-Julius
I found my host at dinner with his wife, little daughter, and sister-in-law.In the Heart of Vosges
His sister-in-law treated him badly and never gave him enough to eat.
His sister-in-law wished to see his art, so she poured the rice into the pot.
If this young lady is my sister-in-law, surely she and I can settle up our own affairs.The Avenger
E. Phillips Oppenheim
- the sister of one's husband or wife
- the wife of one's brother
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for sister-in-law
Online Etymology Dictionary, © 2010 Douglas Harper