An Encylopedia Britannica Company

psychosis

1 ENTRIES FOUND:
psychosis /saɪˈkoʊsəs/ noun
plural psychoses /-ˈkoʊˌsiːz/ /saɪˈkoʊˌsiːz/
psychosis
/saɪˈkoʊsəs/
noun
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