Definition of mountain
1a
: a landmass that projects conspicuously above its surroundings and is higher than a hill
The sun set behind the mountains.
b
: an elongated ridge
2a
: a great mass
a mountain of a man— E. K. Brown
b
: a vast number or quantity
a mountain of mail a mountain of debt
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Merriam-Webster unabridged
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Time Traveler for mountain
The first known use of mountain was in the 13th century
See more words from the same century