Sister-in-law Definition
 sĭstər-ĭn-lô 
  sisters-in-law
  
    noun
  
 The sister of one's husband or wife.
 Webster's New World 
The wife of one's sibling.
 Webster's New World 
The wife of a sibling of one's husband or wife.
 Webster's New World 
Other Word Forms of Sister-in-law
Noun
Singular:
 sister-in-lawPlural:
 sisters-in-lawFind Similar Words
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