silver willow sil·ver·wil·low uncommon noun 1. North American willow with grayish silky pubescent leaves that usually blacken in drying Synonymssilver willowsilky willowSalix alba sericeaSalix sericea Related words Broader terms willow Parts Salix WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
