mountaineerˈ noun

1. A climber of mountains
2. An inhabitant of a mountainous area
3. A member of the Mountain (historical)

To climb mountains

mountaineerˈing noun

Mountain climbing

mountˈainous adjective

1. Full of, or characterized by, mountains
2. Large as a mountain
3. Huge

mountain ash noun

1. The rowan tree
2. Any of several eucalyptus trees, esp Eucalyptus regnans (Aust)

mountain avens see avens

mountain beaver noun

The sewellel

mountain bicycle or mountain bike noun

A bicycle with a strong, heavy frame and wide tyres designed for use over rough terrain

mountain biker noun

mountain biking noun

mountain blue noun

Blue basic carbonate of copper, azurite

mountˈainboarder noun

mountˈainboarding noun

The sport of riding a mountˈainboard, a narrow board mounted on wheels and fitted with a steering mechanism, down mountain tracks or other types of rugged terrain

mountain bramble noun

The cloudberry

mountain cat noun

A catamount, a wildcat

mountain chain noun

A range of mountains forming a long line

mountain cork noun

A matted mass of a fibrous amphibole with a cork-like texture

mountain devil noun

A moloch

mountain dew noun (informal)

Whisky, esp illicitly-distilled

mountˈain-everlastˈing noun

The cat's-foot (Antennaria dioica), a small woolly composite plant of the hills and seashore

mountain flax noun

1. Any of various small herbs of the genus Phormium or Linum
2. Amianthus

mountain goat noun

1. A white goatlike animal of the Rocky Mountains (genus Oreamnus)
2. Any of various wild goats of mountainous regions

mountain hare noun

A small species of hare, grey in summer, usu white in winter

mountˈain-high or mountˈains-high adverb and adjective

High as a mountain, overwhelmingly high

mountain laurel noun

An ericaceous shrub of N America (genus Kalmia)

mountain leather noun

A matted mass of a fibrous amphibole with a leathery texture

Mountain Limestone noun

The lowest division of the Carboniferous division of Palaeozoic rock in England, the Carboniferous Limestone

mountain lion noun

The puma or cougar

mountain marrow noun

Lithomarge

mountain meal noun

Bergmehl

mountain railway or (N American) mountain railroad noun

A light narrow-gauge railway for mountainous regions, usu a rack railway

mountain range noun

A series of adjoining mountains

mountain ringlet noun

Erebia epiphron, a rare alpine butterfly

mountain sheep noun

The bighorn, a large wild sheep of the Rocky Mountains, with large horns

mountain sickness noun

Sickness brought on by breathing rarefied air

mountˈainside noun

The slope of a mountain

mountain soap noun

A greasy kind of halloysite

Mountain Standard Time or Mountain Time noun

One of the standard times used in N America, being 7 hours behind Greenwich Mean Time (abbrev MST or MT)

mountain tallow noun

Hatchettite

mountain tea noun

The American evergreen plant Gaultheria procumbens (also called wintergreen)

mountˈain-top noun

mountain wood noun

A fibrous wood-like asbestos

make a mountain out of a molehill see under mole¹

Old Man of the Mountain

A popular name for the chief of the Hashshāshīn (see assassin)