/ Dictionary / Index O oleaster: Meaning and Definition of Find definitions for: o•le•as•ter Pronunciation: (ō"lē-as'tur), [key] — n. an ornamental shrub or small tree, Elaeagnus angustifolia, of Eurasia, having fragrant yellow flowers and an olivelike fruit. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oleaster (Thesaurus) oleander oleate Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language