/ˌskɪtsəˈfri:niə ||; ˌskɪtzəˈfrinɪə/noun [U] a serious mental illness in which a person confuses the real world and the world of the imagination and often behaves in strange and unexpected ways 精神分裂症 ➔schizophrenic /ˌskɪtsəˈfrenɪk/ adj noun [C]