the southernmost region of South America, in Argentina and Chile extending from the Andes to the Atlantic. Area: about 777 000 sq km (300 000 sq miles)
2.
an arid tableland in the southernmost part of Argentina, rising towards the Andes in the west
Patagonia in American English
(ˌpætəˈgoʊniə; ˌpætəˈgoʊnjə)
dry, grassy region in S South America, east of the Andes, including the S parts of Argentina and Chile: often restricted to the portion, c. 250,000 sq mi (647,498 sq km), in Argentina