silver berry sil·ver·berry uncommon noun 1. deciduous shrubby tree of Europe and western Asia having gray leaves and small yellow fruits covered in silvery scales; sometimes spiny SynonymsRussian olivesilver berryElaeagnus augustifolia 2. deciduous unarmed North American shrub with silvery leaves and fruits Synonymssilverberrysilver berrysilverbushsilver-bushElaeagnus commutata Related words Broader terms oleaster WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.