DuckCorp Dico

Found 2 definitions

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Sis \Sis\, n.
      A colloquial abbreviation of Sister.
      [1913 Webster]
   
                   
                 

2.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Sis \Sis\, n.
      Six. See Sise. [Obs.] --Chaucer.
      [1913 Webster] Sisal grass