Noun christmasberry has 2 senses
- Christmasberry, Christmas berry, Lycium carolinianum - spiny evergreen shrub of southeastern United States having spreading branches usually blue or mauve flowers and red berries
--1 is a kind of shrub, bush
--1 is a member of Lycium, genus Lycium
- toyon, tollon, Christmasberry, Christmas berry, Heteromeles arbutifolia, Photinia arbutifolia - 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
--2 is a kind of shrub, bush
--2 is a member of Heteromeles, genus Heteromeles
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