epoxy UK /ɪˈpɒk.si/US /ɪˈpɑk.si/adjective 1noun 1verb 1forms 4 adjective1 •Derived from an epoxide. noun1 •A thermosetting polyepoxide resin used chiefly in strong adhesives, coatings and laminates; epoxy resin. verb1 •To glue with epoxy. formsepoxied · epoxyed · epoxying · epoxies