noun
- A 5, 000 pound laser-guided bomb that can be programmed to penetrate to a given depth before exploding; used to penetrate hardened underground facilities.
- synonyms: Bunker Buster, Guided Bomb Unit-28
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). gbu-28. Retrieved September 25, 2026, from http://smartdefine.org/gbu-28/definitions/1278149 |
| Chicago | WordNet. 2010. "gbu-28" http://smartdefine.org/gbu-28/definitions/1278149 (accessed September 25, 2026). |
| Harvard | WordNet 2010, gbu-28, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/gbu-28/definitions/1278149>. |
| MLA | WordNet. "gbu-28" 23 October 2010. Web. 25 September 2026. <http://smartdefine.org/gbu-28/definitions/1278149> |