psy ‧ cho ‧ sis /saɪˈkəʊsəs, saɪˈkəʊsɪs $ -ˈkoʊ-/ BrE AmE noun ( plural psychoses /-siːz/) [uncountable and countable]
a serious mental illness that can change your character and make you unable to behave in a normal way ⇨ psychotic
psy ‧ cho ‧ sis /saɪˈkəʊsəs, saɪˈkəʊsɪs $ -ˈkoʊ-/ BrE AmE noun ( plural psychoses /-siːz/) [uncountable and countable]
a serious mental illness that can change your character and make you unable to behave in a normal way ⇨ psychotic
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012