pneumatologyPronunciation: /ˌnjuːməˈtɒlədʒi/Definition of pneumatology noun [mass noun] the branch of Christian theology concerned with the Holy Ghost and other spiritual concepts. Derivatives pneumatologicalPronunciation: /-təˈlɒdʒɪk(ə)l/ adjective pneumatology in other Oxford dictionaries Definition of pneumatology in the US English dictionary