Christmasberry n 1: spiny evergreen shrub of southeastern United States having spreading branches usually blue or mauve flowers and red berries [syn: {Christmas berry}, {Lycium carolinianum}] 2: ornamental evergreen treelike shrub of the Pacific coast of the United States having large white flowers and red berrylike fruits; often placed in genus Photinia [syn: {toyon}, {tollon}, {Christmas berry}, {Heteromeles arbutifolia}, {Photinia arbutifolia}]