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