From Longman Dictionary of Contemporary Englishpsychosispsy‧cho‧sis /saɪˈkəʊsɪs $ -ˈkoʊ-/ noun (plural psychoses /-siːz/) [countable, uncountable] MPa serious mental illness that can change your character and make you unable to behave in a normal way → psychotic
Examples from the Corpus
psychosis• It is described as a psychosis, which is characterised by a distortion in the person's perception of reality.• Such an image, read in psychological terms, would be the image of a psychosis.• Over 70 percent of both groups were considered psychotic, with rather more men schizophrenic and rather more women suffering affective psychosis.• We seem here to have further evidence of the apparent paradox about creativity and psychosis to which we have referred several times.• Breier and his colleagues wanted to know which area of the brain was involved in this ketamine psychosis.• Some psychologists contend that even some forms of psychosis are retaliatory in nature.• There have also been reports of psychosis following overuse.• Can cause paranoia, psychosis, sterility and flashbacks several years after the drug is taken. 