superclass noun 2verb 1forms 3 noun2 •A high-level class that passes attributes and methods down the hierarchy to subclasses. •A taxon ranking below a phylum and above a class. verb1 •To create a superclass of.Applications incorporating superclassing "clean up" by calling UnregisterClass on all superclassed classes. — 2001 formssuperclassed · superclassing · superclasses