Mount St. Helens

Noun

1.

Mount St. Helens - an active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity Synonyms: Mount Saint Helens, Mt. St. Helens

Cascade Mountains, Cascade Range, Cascades, Evergreen State, Mount Saint Helens, Mt. St. Helens, volcano, WA, Washington