Of or pertaining to a mountain or mountains; growing or living on a mountain; found on or peculiar to mountains; among mountains; as, a mountain torrent; mountain pines; mountain goats; mountain air; mountain howitzer.
source: Webster 1913
noun
a land mass that projects well above its surroundings; higher than a hill
source: WordNet 3.0
(often followed by `of') a large number or amount or extent
A batch of letters. A deal of trouble. A lot of money. He made a mint on the stock market. See the rest of the winners in our huge passel of photos. It must have cost plenty. A slew of journalists. A wad of money.
source: WordNet 3.0
A large mass of earth and rock, rising above the common level of the earth or adjacent land; earth and rock forming an isolated peak or a ridge; an eminence higher than a hill; a mount.