/ Dictionary / Index P ppd.: Meaning and Definition of Find definitions for: ppd. Pronunciation: [key] postpaid. prepaid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. PPB p.p.d.o. Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language