Source : Webster's Revised Unabridged Dictionary (1913)

Elysium \E*ly"sium\, n.; pl. E. {Elysiums}, L. {Elysia}. [L.,
   fr. Gr. ?, ? ?, Elysian field.] (Anc. Myth.)
   1. A dwelling place assigned to happy souls after death; the
      seat of future happiness; Paradise.

   2. Hence, any delightful place.

            An Elysian more pure and bright than that pf the
            Greeks.                               --I. Taylor.

Source : WordNet®

Elysium
     n 1: a place or condition of ideal happiness
     2: (Greek mythology) the abode of the blessed after death [syn:
         {Elysian Fields}]