The Collaborative International Dictionary of English v.0.48:
Macau \Ma*ca"u\, prop. n. Same as Macao, the territory. [PJC]WordNet (r) 3.0 (2006):
Macau 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]