The Collaborative International Dictionary of English v.0.48:

Macedon \Macedon\, Macedonia \Macedonia\prop. n.
   the ancient kingdom of Phillip II and Alexander the Great in
   the Southeastern Balkans that is now part of Greece, Bulgaria
   and the former Yugoslavia.

   Syn: Macedonia.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Macedonia
    n 1: landlocked republic on the Balkan Peninsula; achieved
         independence from Yugoslavia in 1991
    2: the ancient kingdom of Philip II and Alexander the Great in
       the southeastern Balkans that is now divided among modern
       Macedonia and Greece and Bulgaria [syn: Macedon,
       Macedonia, Makedonija]