Определение mental breakdown в Английский Язык Английский Язык словарь
an attack of depression or anxiety so severe that it prevents a person from continuing to function normally
Mental breakdown (also known as a nervous breakdown) is a colloquial term for an acute, time-limited psychiatric disorder that manifests primarily as severe stress-induced depression, anxiety or dissociation in a previously functional individual, to the extent that they are no longer able to function on a day-to-day basis until the disorder is resolved