n. An elevation of land of considerable dimensions rising more or less abruptly above the surrounding or adjacent region.n. Something resembling a mountain in being large; something of extraordinary magnitude; a great heap: as, a mountain of rubbish.n. A wine made from grapes grown on high ground. See II., 2.Of or pertaining to mountains; found on mountains; growing or living on a mountain: as, mountain air; mountain pines; mountain goats.Produced from vines growing on the slopes of a mountain, a hill, or any high ground: as, mountain wine.Like a mountain in size; vast; mighty.