/ Dictionary / Index O Oreg.: Meaning and Definition of Find definitions for: Oreg. Pronunciation: [key] Oregon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ore dressing oregano Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language