a living thing that has leaves and roots and grows in earth, especially one that is smaller than a tree.——朗文当代大辞典

gen. and Biology. A living organism other than an animal, able to subsist wholly on inorganic substances, typically fixed to a substrate and moving chiefly by means of growth, and lacking specialized sensory and digestive organs; spec. (more fully green plant) such an organism belonging to a group (the kingdom Plantae) which comprises multicellular forms having cellulose cell walls and capable of photosynthesis by means of chlorophyll, including trees, shrubs, herbs, grasses, and ferns (the vascular or higher plants), and also mosses and liverworts (the bryophytes). Frequently spec.: a small (esp. herbaceous) organism of this kind, as distinguished from a tree or shrub; (in informal use) such an organism grown for or known by its foliage or fruit, as distinguished from a ‘flower’.——牛津当代大辞典  @en