Definition of wild chestnut
1 a
: a proteaceous shrub (Brabejum stellatifolia) of southern Africa
b
: the nut of this plant containing a kernel that is edible when roasted
2
: a southern African tree (Calodendron capense) of the family Rutaceae with panicles of handsome white flowers for which it is sometimes cultivated;
also
: its edible black seed
3
: a Philippine tree (Castanopsis philippinensis) related to the true chestnut;
also
: the seed of this tree
