bonsaibonsai /ˈbɑnsaɪ, -zaɪ/ noun [countable, uncountable] 
a tree that is grown so that it always stays very small, or the art of growing trees in this way [Origin: 1900–2000 Japanese tray planting]—bonsai adjective
a tree that is grown so that it always stays very small, or the art of growing trees in this way [Origin: 1900–2000 Japanese tray planting]—bonsai adjective