appalachian mountains is a noun meaning "a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico; a historic barrier to early westward expansion of the United States". It carries one recorded sense.
a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico; a historic barrier to early westward expansion of the United States
Definitions, synonyms and semantic relations for appalachian mountains come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.