Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky. / Resembling a mountain, especially in size; huge; towering.

(geography) A series of adjoining mountains, often in a line.

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

the sloping side of a mountain

Situated or occurring on the summit of a mountain.

on the sloping side of a mountain

The summit of a mountain.