a tree or shrub with berries that produce a soapy froth when crushed, in particular:
a plant with saponin-rich berries that are used as a soap substitute (genus Sapindus, family Sapindaceae).a North American shrub with edible berries (Shepherdia canadensis, family Elaeagnaceae).
the berry of any of the soapberry plants.
soapberry in other Oxford dictionaries
Definition of soapberry in the US English dictionary
