/ Dictionary / Index P penna: Meaning and Definition of Find definitions for: pen•na Pronunciation: (pen'u), [key] — pl. pen•nae a contour feather, as distinguished from a down feather, plume, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Penn pennaceous Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language