/ Dictionary / Index P pipi: Meaning and Definition of Find definitions for: pi•pi Pronunciation: (pē'pē), [key] — pl. -pi, -pis. an edible bivalve of eastern Australia, Plebidonax deltoides. an edible bivalve of New Zealand, Mesodesma novae-zelandiae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pipe wrench piping Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language