Source : Webster's Revised Unabridged Dictionary (1913)

Orion \O*ri"on\, n. [L., fr. Gr. ?, orig., a celebrated hunter
   in the oldest Greek mythology, after whom this constellation
   was named.] (Astron.)
   A large and bright constellation on the equator, between the
   stars Aldebaran and Sirius. It contains a remarkable nebula
   visible to the naked eye.

         The flaming glories of Orion's belt.     --E. Everett.

Source : WordNet®

Orion
     n 1: (Greek mythology) a giant Boeotian hunter who pursued the
          Pleiades and was eventually slain by Artemis; was then
          placed in the sky as a constellation
     2: a constellation on the equator east of Taurus; contains
        Betelgeuse and Rigel [syn: {The Hunter}]