antipsychotic

adjective

1. of or relating to any of various substances used in the treatment of psychosis, especially schizophrenia, and acute or severe states of mania, depression, or paranoia.

noun

2. Also called major tranquilizer, neuroleptic. any such substance, as the phenothiazines.

adjective

1. preventing or treating psychosis

noun

2. any antipsychotic drug, such as chlorpromazine: used to treat such conditions as schizophrenia

adj.

1. Counteracting or diminishing the symptoms of a psychotic disorder such as schizophrenia, paranoia, or bipolar disorder.