Source : Webster's Revised Unabridged Dictionary (1913)

Shaitan \Shai"tan\, Sheitan \Shei"tan\, n. [Written also
   {sheytan}.] [Hind. shait[=a]n, fr. Ar. shai[.t][=a]n.]
   1. Among Mohammedans:
      (a) An evil spirit; the evil one; the devil.
      (b) One of bad disposition; a fiend. [Colloq.]

   2. (Meteor.) A dust storm. [India]

Source : WordNet®

shaitan
     n : (Islam) a rebellious jinni who leads men astray [syn: {shaytan}]