Indonesia (in"dunē'zhu) [key], officially Republic of Indonesia, republic (2005 est. pop. 241,974,000), c.735,000 sq mi (1,903,650 sq km), SE Asia, in the Malay Archipelago. The fourth most populous country in the world, Indonesia comprises more than 13,000 islands extending c.3,000 mi (4,830 km) along the equator from the Malaysia mainland toward Australia; the archipelago forms a natural barrier between the Indian and Pacific oceans. The capital and largest city is Jakarta, on Java.
