1 a very high hill, often with rocks near the top:
a chain / range of mountains * to climb a mountain * We spent a week walking in the mountains. * to enjoy the mountain air / scenery * mountain roads / streams / villages * a mountain rescue team * There is still snow on the mountain tops.
2 [oftenpl.] ~ of sth (informal) a very large amount or number of sth:
a mountain of work * We made mountains of sandwiches. * the problem of Europe's butter mountain (= the large amount of butter that has to be stored because it is not needed)
IDIOMS
make a mountain out of a molehill (disapproving) to make an unimportant matter seem important
