/ Dictionary / Index W West Prussia: Meaning and Definition of Find definitions for: West' Prus'sia Pronunciation: (vest"proi'sun). [key] a former province of Prussia: since 1945 part of Poland. German, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Westport West Puente Valley Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language