/ Dictionary / Index S Seleucia: Meaning and Definition of Find definitions for: Se•leu•cia Pronunciation: (si-l'shu), [key] — n. an ancient city in Iraq, on the Tigris River: capital of the Seleucid empire. an ancient city in Asia Minor, near the mouth of the Orontes River: the port of Antioch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Seler Seleucid Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language