1. 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; [syn: Appalachians, Appalachian Mountains]
WordNet (r) 3.0 (2006):
Appalachians
n 1: 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 [syn:
Appalachians, Appalachian Mountains]