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