cork tree corkt·ree uncommon noun 1. deciduous tree of China and Manchuria having a turpentine aroma and handsome compound leaves turning yellow in autumn and deeply fissured corky bark Synonymscork treePhellodendron amurense 2. prickly Australian coral tree having soft spongy wood Synonymscork treeErythrina vespertilio Related words Broader terms coral treetree Parts Phellodendron WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.