Estremadura (1,111), a coast province of Portugal, between Beira and Alemtejo, watered by the Tagus; richly fertile in many parts, but sparely cultivated; silk is an important industry, and an increasing; Lisbon is the chief city, and with Setubal monopolises the trade; salt, fruits, wine, and oil are exported; also name of a district in Spain between Portugal and New Castile, now divided into the provinces of Badajoz and Cácéres.