/ Dictionary / Index P per annum: Meaning and Definition of Find definitions for: per an•num Pronunciation: (pur an'um), [key] by the year; yearly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. per an. perborate 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