peachleaf willow peach·leaf·wil·low uncommon noun 1. willow of the western United States with leaves like those of peach or almond trees Synonymspeachleaf willowpeach-leaved willowalmond-leaves willowSalix amygdaloides Related words Broader terms willow Parts Salix WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.