Pronunciation: (ap"u-lā'chē-un, -chun, -lach'ē-un, lach'un),[key] —adj. 1. of or pertaining to the Appalachian Mountains.
2. of or pertaining to the region of Appalachia, its inhabitants, or their culture.
3. Geol.of or pertaining to the orogeny and accompanying intrusion that occurred in eastern North America during the Pennsylvanian and Permian periods.
—n. a native or inhabitant of Appalachia, esp. one of predominantly Scotch-Irish, English, or German ancestry who exemplifies the characteristic cultural traditions of this region.