Source : Webster's Revised Unabridged Dictionary (1913)

Diva \Di"va\ (d[=e]"v[.a]), n.; It. pl. {Dive} (d[=e]"v[=a]).
   [It., prop. fem. of divo divine, L. divus.]
   A prima donna.

Source : WordNet®

diva
     n : a distinguished female operatic singer; a female operatic
         star [syn: {prima donna}]
     [also: {dive} (pl)]