psy·cho·sis   (sī-kō'sĭs)    n.   pl. psy·cho·ses (-sēz) A severe mental disorder, with or without organic damage, characterized by derangement of personality and loss of contact with reality and causing deterioration of normal social functioning.

Main Entry: psy·cho·sis
Pronunciation: sI-'kO-s&s
Function: noun
Inflected Form: plural psy·cho·ses /-"sEz/
: a serious mental disorder (as schizophrenia) characterized by defective or lost contact with reality often with hallucinations or delusions

psychosis psy·cho·sis (sī-kō'sĭs)
n. pl. psy·cho·ses (-sēz)
A severe mental disorder, with or without organic damage, characterized by derangement of personality and loss of contact with reality and causing deterioration of normal social functioning.

psychosis   (sī-kō'sĭs)  Pronunciation Key  Plural psychoses (sī-kō'sēz) A mental state caused by psychiatric or organic illness, characterized by a loss of contact with reality and an inability to think rationally. A psychotic person often behaves inappropriately and is incapable of normal social functioning. psychotic adjective (sī-kŏt'ĭk)