Tagus

(ta'gus,) [Sp. Tajo,] the principal river of Portugal, rising in Spain on the dividing frontier of the pro vs. Aragon and New Castile, and emptying into a broad and capacious æstu ary of the Atlantic, (the upper part of which forms the harbor of Lisbon,) after a general S. and W. course of400 m. [s. 876]