/ Dictionary / Index P penny post: Meaning and Definition of Find definitions for: pen'ny post' Pronunciation: [key] (formerly) any of various postal systems delivering mail for a penny a letter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. penny pincher pennyroyal 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