| Noun | 1. | Papua New Guinea - a parliamentary democracy on the eastern half of the island of New Guinea; in 1975 it became an independent state within the Commonwealth of NationsBritish Commonwealth, Commonwealth of Nations - an association of nations consisting of the United Kingdom and several former British colonies that are now sovereign states but still pay allegiance to the British Crown Bismarck Archipelago - a group of islands in the southwestern Pacific to the northeast of New Guinea; part of Papua New Guinea Bougainville - the largest of the Solomon Islands; a province of Papua New Guinea New Guinea - a Pacific island to the north of Australia; the 2nd largest island in the world; the western part is governed by Indonesia and the eastern part is Papua New Guinea Papua - the southeastern part of Papua New Guinea capital of Papua New Guinea, Port Moresby - the administrative capital and largest city of Papua New Guinea |