/ Dictionary / Index O Ostia: Meaning and Definition of Find definitions for: Os•ti•a Pronunciation: (os'tē-uIt.ô'styä), [key] — n. a town in central Italy, SW of Rome: ruins from 4th centuryb.c.;site of ancient port of Rome. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Österreich Ostiak Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language