Source : Webster's Revised Unabridged Dictionary (1913)

Pantheon \Pan*the"on\, n. [L. pantheon, pantheum, Gr. ? (sc. ?),
   fr. ? of all gods; ?, ?, all + ? a god: cf. F. panth['e]on.
   See {Pan-}, and {Theism}.]
   1. A temple dedicated to all the gods; especially, the
      building so called at Rome.

   2. The collective gods of a people, or a work treating of
      them; as, a divinity of the Greek pantheon.

Source : WordNet®

pantheon
     n 1: all the gods of a religion
     2: a monument commemorating a nation's dead heroes
     3: (antiquity) a temple to all the gods