hyperphenomenal UK /ˌhaɪ.pə.fəˈnɒm.ɪ.nəl/US /ˌhaɪ.pəɹ.fəˈnɑm.ɪ.nəl/ adjective1 •(rare) Above and beyond what is phenomenal; superphenomenal. formsmore hyperphenomenal · most hyperphenomenal