an island in the S Pacific, northeast of New Guinea: the largest island of the Bismarck Archipelago; part of Papua New Guinea; mountainous, with several active volcanoes. Capital: Rabaul. Pop: 161 737 (2000). Area: 36 519 sq km (14 100 sq miles)
New Britain in American English
1.
largest island of the Bismarck Archipelago, east of New Guinea: 14,100 sq mi (36,519 sq km); pop. (with small nearby islands) 264,000