/ Dictionary / Index O Oporto: Meaning and Definition of Find definitions for: O•por•to Pronunciation: (ō-pôr'tō, ō-pōr'-), [key] — n. a port in NW Portugal, near the mouth of the Douro River. 300,925. Portuguese, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oporto (Thesaurus) OPM opossum Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language