/ Dictionary / Index P PPI: Meaning and Definition of Find definitions for: PPI Pronunciation: [key] patient package insert: a leaflet included with a prescription medication indicating its proper use. plan position indicator. producer price index. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. PPH ppl. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language