administrative zone of China, consisting of a peninsula & two small adjacent islands at the mouth of the Zhu River, west of Hong Kong: formerly under Portuguese administration: 6.6 sq mi (17 sq km); pop. 339,000
its capital, a seaport coextensive with the peninsula
An administrative region of southeast China comprising Macao Peninsula and two offshore islands in the South China Sea west of Hong Kong. A Portuguese trading post was established here in 1557 and became a free port in 1849. Macao was a Portuguese overseas province until 1999, when it reverted to Chinese sovereignty. The city of Macao, coextensive with the peninsula, is the capital. Population: 457,000.