Breadcrumb Home > Dictionary > Index P pli: Meaning and Definition of Find definitions for: pli Pronunciation: [key] pounds per linear inch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plf pliable ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language