| NOUN | location | Mount St. Helens, Mount Saint Helens, Mt. St. Helens | an active volcano in the Cascade Range in southwestern Washington |
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| Meaning | An active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity. | |
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| Synonyms | Mount Saint Helens, Mt. St. Helens | |
| Instance of | volcano | A mountain formed by volcanic material |
| Part of | Cascades, Cascade Range, Cascade Mountains | A mountain range in the northwestern United States extending through Washington and Oregon and northern California |
| Washington, Evergreen State, WA | A state in northwestern United States on the Pacific | |