The Collaborative International Dictionary of English v.0.48:

Cosmopolitan \Cos`mo*pol"i*tan\, Cosmopolite \Cos*mop"o*lite\,
   a.
   1. Having no fixed residence; at home in any place; free from
      local attachments or prejudices; not provincial; liberal.
      [1913 Webster]

            In other countries taste is perphaps too exclusively
            national, in Germany it is certainly too
            cosmopolite.                          --Sir W.
                                                  Hamilton.
      [1913 Webster]

   2. Common everywhere; widely spread; found in all parts of
      the world.
      [1913 Webster]

            The Cheiroptera are cosmopolitan.     --R. Owen.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cosmopolitan \Cos`mo*pol"i*tan\ (-p?l"?-tan), Cosmopolite
\Cos*mop"o*lite\ (k?z-m?p"?-l?t), n. [Gr. kosmopoli`ths; ko`smos
   the world + poli`ths citizen, po`lis city: cf. F.
   cosmopolitain, cosmopolite.]
   One who has no fixed residence, or who is at home in every
   place; a citizen of the world.
   [1913 Webster] Cosmopolitan

WordNet (r) 3.0 (2006):

cosmopolitan
    adj 1: growing or occurring in many parts of the world; "a
           cosmopolitan herb"; "cosmopolitan in distribution" [syn:
           cosmopolitan, widely distributed] [ant: endemic]
    2: composed of people from or at home in many parts of the
       world; especially not provincial in attitudes or interests;
       "his cosmopolitan benevolence impartially extended to all
       races and to all creeds"- T.B. Macaulay; "the ancient and
       cosmopolitan societies of Syria and Egypt"; "that queer,
       cosmopolitan, rather sinister crowd found around the
       Marseilles docks" [ant: provincial]
    3: of worldwide scope or applicability; "an issue of
       cosmopolitan import"; "the shrewdest political and ecumenical
       comment of our time"- Christopher Morley; "universal
       experience" [syn: cosmopolitan, ecumenical,
       oecumenical, general, universal, worldwide, world-
       wide]
    n 1: a sophisticated person who has travelled in many countries
         [syn: cosmopolitan, cosmopolite]

Moby Thesaurus II by Grady Ward, 1.0:

119 Moby Thesaurus words for "cosmopolitan":
   all-comprehending, all-comprehensive, all-covering, all-embracing,
   all-encompassing, all-filling, all-including, all-inclusive,
   all-pervading, allover, blase, braw, broad, broad-gauged,
   broad-minded, catholic, chic, citizen, citizen by adoption,
   city slicker, civic, civil, classy, clothes-conscious, common,
   communal, cosmopolite, country-wide, dapper, dashing,
   dressed to advantage, dressed to kill, ecumenic, ecumenical,
   ecumenistic, elegant, experienced, exquisite, galactic, general,
   genteel, hyphenate, hyphenated American, immigrant, international,
   jaunty, knowing, man of experience, man-about-town, mature,
   matured, metic, national, natty, naturalized citizen, neat, nifty,
   nobby, nondenominational, noninsular, nonnative citizen,
   nonsectarian, not born yesterday, old, planetary, posh, practiced,
   public, recherche, ripe, ripened, ritzy, sagacious, seasoned,
   sharp, sleek, slicker, smart, smug, snazzy, social, societal,
   soigne, soignee, sophisticate, sophisticated, spacious of mind,
   spiffy, spruce, state, style-conscious, subject, supranational,
   swank, swanky, swell, total, traveled, tricksy, tried,
   tried and true, trig, trim, unbigoted, unfanatical, unhidebound,
   universal, unparochial, unprovincial, veteran, well-dressed,
   well-groomed, well-traveled, wide, wide-minded, world-wide,
   world-wise, worldly, worldly-wise