treeshiprare.|ˈtriːʃɪp| [f. as prec. + -ship.] The condition of being a tree; existence as a tree. 1791Cowper Yardley Oak 61 Through all the stages..Of treeship—first a seedling,..Then twig; then sapling [etc.].1849H. Miller Footpr. Creat. xiv. (1874) 246.