/ Dictionary / Index O Olean: Meaning and Definition of Find definitions for: O•le•an Pronunciation: (ō"lē-an'), [key] — n. a city in SW New York. 18,207. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oleaginous oleander Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language