1. Bismarck Archipelago - Noun
2. Bismarck Archipelago - Proper noun
a group of islands in the southwestern Pacific to the northeast of New Guinea; part of Papua New Guinea
Source: WordNetThe Lapita culture, hypothesized to have spoken proto-Oceanic, and defined by its typical style of pottery, originated to the northwest in the Bismarck Archipelago around 1500 BC. Source: Internet