Real Dictionary

dogwood
variable noun: A dogwood is a tree or bush that has groups of small white flowers surrounded by four large leaves.

dogwood in American English
any of a genus (Cornus) of trees and shrubs of the dogwood family, esp. the flowering dogwood
designating a family (Cornaceae, order Cornales) of dicotyledonous small trees and shrubs
adjective: having the color dogwood
noun: any tree or shrub of the genus Cornus, esp. C. sanguinea, of Europe, or C. florida, of America

dogwood in British English
noun: any of various cornaceous trees or shrubs of the genus Cornus, esp C. sanguinea, a European shrub with clusters of small white flowers and black berries: the shoots are red in winter