catharsis

1. A release of emotional tension after an overwhelming vicarious experience, resulting in the purging or purification of the emotions, as through watching a dramatic production (especially a tragedy). (countable, uncountable)
2. Any release of emotional tension to the same effect, more widely. (countable, uncountable)
3. A purification or cleansing, especially emotional. (countable, uncountable)
4. A therapeutic technique to relieve tension by reestablishing the association of an emotion with the memory or idea of the event that first caused it, and then eliminating it by complete expression (called the abreaction). (countable, uncountable)
5. A purging of the digestive system. (countable, uncountable)

Plural catharses