metapsychologyPronunciation: /mɛtəsʌɪˈkɒlədʒi/Definition of metapsychology noun [mass noun] the study of mental processes and the mind-body relationship, beyond what can be studied experimentally. Derivatives metapsychologicalPronunciation: /-kəˈlɒdʒɪk(ə)l/ adjective metapsychology in other Oxford dictionaries Definition of metapsychology in the US English dictionary