[cat.a.ton.ic] adj (1904) 1: of, relating to, being, resembling, or affected by schizophrenia characterized esp. by a marked psychomotor disturbance that may involve stupor or mutism, negativism, rigidity, purposeless excitement, and inappropriate or bizarre posturing
2: characterized by a marked lack of movement, activity, or expression -- catatonic n -- cat.a.ton.i.cal.ly adv