noun
1.
a. : any of several native alders (as Alnus rhombifolia ) of western No. America
b. : gray alder
2. : any shrub or tree of the genus Clethra
3. : a southern African tree ( Platylophus trifoliatus ) of the family Cunoniaceae
4. : privet andromeda
5. : a winterberry ( Ilex verticillata )