Mount St. Helens(redirected from Mt St Helens)
Also found in: Thesaurus.
Switch to new thesaurus
|Noun||1.||Mount St. Helens - an active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.