1. Treatment of emotional, behavioral, personality, and psychiatric disorders based primarily on verbal or nonverbal communication and interventions with a patient, in contrast to treatments utilizing chemical and physical measures: "Dr. Herman applied psychotherapies which involved applications of psychological knowledge to treat the psychiatric disorders of his patients."
2. The treatment of disorders of the mind or personality by psychological or psychophysiological methods: "Vernon's psychotherapy involves the treatment of psychological disorders or maladjustments by professional techniques, as with psychoanalyses, group therapies, or behavioral therapies."