noun
- An active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity.
- synonyms: Mount Saint Helens, Mount St. Helens
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). Mt. St. Helens. Retrieved September 21, 2026, from http://smartdefine.org/mt._st._helens/definitions/1296173 |
| Chicago | WordNet. 2010. "Mt. St. Helens" http://smartdefine.org/mt._st._helens/definitions/1296173 (accessed September 21, 2026). |
| Harvard | WordNet 2010, Mt. St. Helens, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/mt._st._helens/definitions/1296173>. |
| MLA | WordNet. "Mt. St. Helens" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/mt._st._helens/definitions/1296173> |