/ Dictionary / Index P per centum: Meaning and Definition of Find definitions for: per cent•um Pronunciation: (pur sen'tum), [key] percent (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. percent sign percept Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language