psychosis
/saɪˈkoʊsəs/
noun
plural
psychoses
/-ˈkoʊˌsiːz/
/saɪˈkoʊˌsiːz/
plural
psychoses
/-ˈkoʊˌsiːz/
/saɪˈkoʊˌsiːz/
Britannica Dictionary definition of PSYCHOSIS
[count, noncount]
:
a very serious mental illness that makes you behave strangely or believe things that are not true