Source : Webster's Revised Unabridged Dictionary (1913)

Chiliasm \Chil"i*asm\, n. [Gr. ?, fr. ?. See Chiliad.]
   1. The millennium.

   2. The doctrine of the personal reign of Christ on earth
      during the millennium.

Source : WordNet®

chiliasm
     n : belief in the Christian doctrine of the millennium mentioned
         in the Book of Revelations [syn: {millenarianism}, {millenniumism}]