A flowering evergreen shrub, Kalmia latifolia, in the family Ericaceae, native to the eastern United States, all parts of which are toxic, the state tree of Connecticut and Pennsylvania.

The time zone that encompasses the segment of the United States that includes the Rocky Mountains.

plural of mountain goat

The sport of climbing mountains.

(now rare) A person who lives in a mountainous area (often with the connotation that such people are outlaws or uncivilized). / A person who climbs mountains for sport or pleasure.

(intransitive) To climb mountains; to climb using the techniques of a mountaineer. / (intransitive, figuratively) To climb as if on a mountain.

A popular aquarium fish, Tanichthys albonubes.

The geological processes, such as tectonic plate movement and volcanic activity, by which mountains are formed.

the sloping side of a mountain

on the sloping side of a mountain