/ Dictionary / Index P penny stock: Meaning and Definition of Find definitions for: pen'ny stock" Pronunciation: [key] — Stock Exchange. Stock Exchange. common stock, usually highly speculative, selling for less than a dollar a share. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pennyroyal pennyweight 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