A mountain in the Andes, in western Argentina near the Chilean border, rising to 22,834 feet (6,960 m). It is the highest mountain in the western hemisphere.
Definition of Aconcagua in US English:
Aconcagua
proper nounˌäk-
A mountain in the Andes, in western Argentina near the Chilean border, rising to 22,834 feet (6,960 m). It is the highest mountain in the western hemisphere.