Oceania is a traditional region in the Pacific Ocean and the Southern hemisphere: it consists of Australia, New Zealand and numerous island countries. Wider understanding of Oceania includes island parts of South East Asia (all Indonesia and the Phillipines.
The islands of the central and S Pacific, including Micronesia, Melanesia, Polynesia, and traditionally Australasia. About 3,450,000 sq. mi. (8,935,500 sq. km).