/ Dictionary / Index P porion: Meaning and Definition of Find definitions for: po•ri•on Pronunciation: (pôr'ē-on", pōr'-), [key] — pl. po•ri•a po•ri•ons. the most lateral point in the roof of the bony external auditory meatus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. poriform pork 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