Schizophreniform disorder refers to a disorder characterized by psychotic symptoms that are essentially the same as those found in schizophrenia, except for the duration and chronic nature of the symptoms; specifically, symptoms usually last less than six (6) months; a psychotic disorder involving the symptoms of schizophrenia but lasting less than six (6) months.
Moreover, Schizophreniform disorder refers to a psychotic disorder with symptoms similar to but less severe than those found in Schizophrenia which must last less than six (6) months, in contrast to symptoms in schizophrenia, which last more than six (6) months and must have prodromal, active, and residual phases.
Other /More definition:
schizophreniform disorder refers to psychotic disorder involving the symptoms of Schizophrenia but lasting less than six (6) months.