region of WC Spain, on the Portuguese border: 16,063 sq mi (41,603 sq km); pop. 1,062,000
region of W Portugal, on the Atlantic: chief city, Lisbon
See Estremadura in American Heritage Dictionary 4
A historical region and former province of western Portugal surrounding Lisbon.
A historical region of west-central Spain bordering on Portugal. Reconquered from the Moors in the 12th and 13th centuries, it was frequently a battlefield in the Spanish territorial wars with Portugal and in the Peninsular War fought between France and Great Britain (1808-1814).