The Collaborative International Dictionary of English v.0.48:

Occident \Oc"ci*dent\, n. [F., fr. L. occidens, occidentis, fr.
   occidents, p. pr. of occidere to fall or go down. See
   Occasion.]
   The part of the horizon where the sun last appears in the
   evening; that part of the earth towards the sunset; the west;
   -- opposed to orient. Specifically, in former times, Europe
   as opposed to Asia; now, also, the Western hemisphere.
   --Chaucer.
   [1913 Webster]

         I may wander from east to occident.      --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Occident
    n 1: the countries of (originally) Europe and (now including)
         North America and South America [syn: West, Occident]
    2: the hemisphere that includes North America and South America
       [syn: western hemisphere, occident, New World]

The Devil's Dictionary (1881-1906):

OCCIDENT, n.  The part of the world lying west (or east) of the
Orient.  It is largely inhabited by Christians, a powerful subtribe of
the Hypocrites, whose principal industries are murder and cheating,
which they are pleased to call "war" and "commerce."  These, also, are
the principal industries of the Orient.