mountain pass is a noun meaning "the location in a range of mountains of a geological formation that is lower than the surrounding peaks". It carries one recorded sense.
the location in a range of mountains of a geological formation that is lower than the surrounding peaks
“we got through the pass before it started to snow”
Definitions, synonyms and semantic relations for mountain pass come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.