Source : Webster's Revised Unabridged Dictionary (1913)

Siva \Si"va\, n. [Skr. Civa, properly, kind, gracious.] (Hindoo
   Myth.)
   One of the triad of Hindoo gods. He is the avenger or
   destroyer, and in modern worship symbolizes the reproductive
   power of nature.

Source : WordNet®

Siva
     n : the Destroyer; one of the three major divinities in the
         later Hindu pantheon [syn: {Shiva}]