The Collaborative International Dictionary of English v.0.48:

global \glob"al\ adj.
   1. involving the entire earth; not limited or provincial in
      scope; as, global war; global monetary policy.

   Syn: planetary, worldwide.
        [WordNet 1.5]

   2. shaped like a globe; spherical.

   Syn: ball-shaped, globose, globular, orbicular, spheric,
        spherical.
        [WordNet 1.5]

   3. broad in scope or content; comprehensive. Opposite of
      noncomprehensive.

   Syn: all-embracing, all-inclusive, across-the-board,
        blanket(prenominal), broad, complete, panoptic, wide.
        [WordNet 1.5]

   4. (Computers) Accessible and effective throughout an entire
      computer program, rather than in only one subroutine; --
      used of variables; as, global variable. Opposite of
      local.
      [PJC]

WordNet (r) 3.0 (2006):

global
    adj 1: involving the entire earth; not limited or provincial in
           scope; "global war"; "global monetary policy"; "neither
           national nor continental but planetary"; "a world
           crisis"; "of worldwide significance" [syn: global,
           planetary, world(a), worldwide, world-wide]
    2: having the shape of a sphere or ball; "a spherical object";
       "nearly orbicular in shape"; "little globular houses like
       mud-wasp nests"- Zane Grey [syn: ball-shaped, global,
       globose, globular, orbicular, spheric, spherical]