/ Dictionary / Index T Tagus: Meaning and Definition of Find definitions for: Ta•gus Pronunciation: (tā'gus), [key] — n. a river in SW Europe, flowing W through central Spain and Portugal to the Atlantic at Lisbon. 566 mi. (910 km) long. Spanish,Portuguese, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tagus (Thesaurus) tag team tahini Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language