/ Dictionary / Index O Ostpreussen: Meaning and Definition of Find definitions for: Ost•preus•sen Pronunciation: (ôst"proi'sun), [key] — n. German name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ostpolitik ostracism 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