Bor ‧ ne ‧ o /ˈbɔːniəʊ $ ˈbɔːr-/ BrE AmE
the largest island of the Malay Archipelago (=a group of many islands) in southeast Asia. Part of it belongs to Malaysia and part of it to Indonesia, and it also includes the Sultanate of ↑ Brunei . Population: 12,000,000 (1991). It is known for its tropical forests.