(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.

The sport of climbing mountains.

plural of mountaineer

plural of mountaineering

simple past tense and past participle of mountaineer

The quality of being mountainous.

In a mountainous manner.

plural of mountainer

(obsolete) A person who lives in a mountainous area.