a natural elevation of the earth's surface rising more or less abruptly to a summit, and attaining an altitude greater than that of a hill, usually greater than 2000 feet (610 meters).
a large mass of something resembling this, as in shape or size.
a huge amount: a mountain of incoming mail.
(initial capital letter) a steam locomotive having a four-wheeled front truck, eight driving wheels, and a two-wheeled rear truck. See table under Whyte classification.
Also called mountain wine. British Archaic. a sweet Malaga wine.
of or pertaining to mountains: mountain air.
living, growing, or located in the mountains: mountain people.
resembling or suggesting a mountain, as in size.
make a mountain out of a molehill. molehill ( def 2 ).

1175–1225; Middle English mountaine < Old French montaigne < Vulgar Latin *montānea, noun use of feminine of *montāneus, equivalent to Latin montān(us) mountainous (mont-, stem of mōns mountain + -ānus -an) + -eus adj. suffix

mountainless, adjective
submountain, adjective
undermountain, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
mountain (ˈmaʊntɪn)
1.  a.  a natural upward projection of the earth's surface, higher and steeper than a hill and often having a rocky summit
 b.  (as modifier): mountain people; mountain scenery
 c.  (in combination): a mountaintop
2.  a huge heap or mass: a mountain of papers
3.  anything of great quantity or size
4.  a surplus of a commodity, esp in the European Union: the butter mountain
5.  informal (Brit) a mountain to climb a serious or considerable difficulty or obstruction to overcome
6.  make a mountain out of a molehill See molehill
[C13: from Old French montaigne, from Vulgar Latin montānea (unattested) mountainous, from Latin montānus, from mons mountain]

Mountain (ˈmaʊntɪn)
the Mountain an extremist faction during the French Revolution led by Danton and Robespierre
[C18: so called because its members sat in the highest row of seats at the National Convention Hall in 1793]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1200, from O.Fr. montaigne, from V.L. *montanea "mountain, mountain region," lit. fem. of *montaneus "of a mountain, mountainous," from L. montanus "mountainous," from mons (gen. montis) "mountain" (see mount (n.)). Until 18c., applied to a fairly low elevation if it was
prominent (e.g. Sussex Downs, the hills around Paris). Mountain dew "raw and inferior whiskey" first recorded 1839.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
mountain   (moun'tən)  Pronunciation Key 
A generally massive and usually steep-sided, raised portion of the Earth's surface. Mountains can occur as single peaks or as part of a long chain. They can form through volcanic activity, by erosion, or by uplift of the continental crust when two tectonic plates collide. The Himalayas, which are the highest mountains in the world, were formed when the plate carrying the landmass of India collided with the plate carrying the landmass of China.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Idioms & Phrases


see if the mountain won't come to Muhammad; make a mountain out of a molehill.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
They range from flat lakeside strolls to steep mountain peak climbs.
This mountain range formed about 70 million years ago.
Of course you've already heard that the Hollywood sign and the entire mountain
  it resides on is for sale.
Living in the mountains may provide benefits beyond a picturesque view.
Image for mountain
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