genus Olea ge·nu·so·lea uncommon noun 1. evergreen trees and shrubs having oily one-seeded fruits SynonymsOleagenus Olea Related words Word family genus Oleandragenus Olearia Broader terms dicot genus Parts Oleaceae Part of olive treeoliveblack mairewhite maire WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.