I had to look that one up and this was what Wikipedia said:
As implied by the definition found in the Oxford English Dictionary, a cathartic experience may refer to a process of releasing pent up emotions, for example by listening to music.
In medicine, a cathartic is a substance which
accelerates defecation. This is in contrast to a
laxative, which is a substance which
eases defecation, usually by softening the
stool.
[1] It is possible for a substance to be both a laxative and a cathartic. However, agents such as
psyllium seed husks increase the bulk of the stool.
Which meaning does it have for you?:lol: