The Collaborative International Dictionary of English v.0.48:

Macao \Ma*ca"o\, n. (Zool.)
   A macaw.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Macao \Ma*ca"o\, prop. n.
   A territory in South China, on the Zhu Jiang river on the
   South China sea, formerly a territory of Portugal. Also, the
   capital city of this territory.
   [PJC]

WordNet (r) 3.0 (2006):

Macao
    n 1: a former Portuguese province on the south coast of China
         and two islands in the South China Sea; reverted to China
         in 1999 [syn: Macao, Macau]