Merriam-Webster Collegiate Dictionary - macao

 or Macau or Chinese Aomen  geographical name  1. peninsula SE China in Guangdong in Xi Delta W of Hong Kong  2. special administrative region SE China comprising ~ Peninsula & two small adjacent islands; formerly a Port. overseas territory with ~ (city) as capital area 6 square miles (16 square kilometers), population 488,000  3. city & port ~ (special administrative region) population 161,252  • Macanese noun