名詞 mountain:

1. a land mass that projects well above its surroundings; higher than a hill
   同義詞：mount
2. a large number or amount
   同義詞：tons, dozens, heaps, lots, piles, scores, stacks, loads, rafts, slews, wads, oodles, gobs, scads, lashings

1. Never make a mountain of a molehill.
   [諺]切勿小題大做。
2. There are rows of tents at the foot of the mountain.
   山腳下有幾排帳篷。
3. We reached the temple through an unfrequented mountain track.
   我們沿著一條人跡罕至的小徑到達了寺廟。
4. The mountain is 3500 meters high.
   這座山有3500米高。
5. The mountain tops are covered with snow.
   白雪覆蓋著山頂。
6. I have a mountain of work to do.
   我有一大堆工作要做。
7. He looks down from the top of the mountain to the valley far below.
   他從山頂向下眺望下面幽深的山谷。

moun.tain

n.（名詞）
Abbr. mt.,Mt.,mtn.,Mtn.A natural elevation of the earth`s surface having considerable mass, generally steep sides, and a height greater than that of a hill.
縮寫 mt.,Mt.,mtn.,Mtn.山：自然形成的高出于地面的一塊高地，占地廣大，通常外側陡峻且比丘陵要高

A large heap:
一大堆：
例句：
a mountain of laundry.
一大堆要洗的衣服

A huge quantity:
大量：
例句：
a mountain of trouble.
很多麻煩

來源：
Middle English mountaine
中古英語 mountaine
from Old French montaigne, muntaigne
源自 古法語 montaigne, muntaigne
from Vulgar Latin *mont3nea
源自 俗拉丁語 *mont3nea
from feminine of *mont3neus [of a mountain]
源自 *mont3neus的陰性詞 [山的]
from Latin mont3nus
源自 拉丁語 mont3nus
from môns mont- [mountain] * see men- 2
源自 môns mont- [山] *參見 men- 2

【引伸】
moun.tainy
adj.（形容詞）