/ Dictionary / Index O Oregon grape: Meaning and Definition of Find definitions for: Or'egon grape' Pronunciation: [key] an evergreen shrub, Mahonia aquifolium, of the barberry family, of the western coast of the U.S., having small blue berries and yellow flowers that are the state flower of Oregon. the berry itself. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Oregon fir Oregon maple Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language