Any of various evergreen shrubs or trees of the genus Buxus, especially the common box, European box, or boxwood (Buxus sempervirens) which is often used for making hedges and topiary.
Various species of Eucalyptus trees are popularly called various kinds of boxes, on the basis of the nature of their wood, bark, or appearance for example, the drooping (Eucalyptus bicolor), shiny-leaved (Eucalyptus tereticornis), black, or ironbark box trees.