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1. Abbr. Mt. or Mtn. A natural elevation of the earth's surface having considerable mass, generally steep sides, and a height greater than that of a hill.
a. A large heap: a mountain of laundry.
b. A huge quantity: a mountain of trouble.
[Middle English mountaine, from Old French montaigne, muntaigne, from Vulgar Latin *montānea, from feminine of *montāneus, of a mountain, from Latin montānus, from mōns, mont-, mountain; see men- in Indo-European roots.]
1. another term for mountainous
2. living in, located in, or related to mountains