cleftgraft noun 1verb 1forms 3 noun1 •A graft of this kind. verb1 •To engraft by cleaving the stock and inserting a scion.Filberts may be cleft-grafted on the common Nut and Servises on their own kind, or propagated by Suckers, Layers or Seeds. — 1708 formscleftgrafted · cleftgrafting · cleftgrafts