/ Dictionary / Index P Peipus: Meaning and Definition of Find definitions for: Pei•pus Pronunciation: (pī'pus), [key] — n. a lake in the N Europe, on the border between Estonia and the W Russian Federation. 93 mi. (150 km) long; 356 sq. mi. (920 sq. km). Russian,Estonian, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Peiping Peiraeus Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language