- any evergreen or deciduous shrub or tree belonging to the genus Rhododendron, of the heath family, having rounded clusters of showy, pink, purple, or white flowers and oval or oblong leaves.
- any ericaceous shrub of the genus Rhododendron, native to S Asia but widely cultivated in N temperate regions. They are mostly evergreen and have clusters of showy red, purple, pink, or white flowers
