noun
- A depression in the floor of the Pacific Ocean between New Guinea and the Solomon Islands. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). bougainville trench. Retrieved October 1, 2026, from http://smartdefine.org/bougainville_trench/definitions/1226659 |
| Chicago | WordNet. 2010. "bougainville trench" http://smartdefine.org/bougainville_trench/definitions/1226659 (accessed October 1, 2026). |
| Harvard | WordNet 2010, bougainville trench, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/bougainville_trench/definitions/1226659>. |
| MLA | WordNet. "bougainville trench" 23 October 2010. Web. 1 October 2026. <http://smartdefine.org/bougainville_trench/definitions/1226659> |