ca ‧ thar ‧ sis /kəˈθɑːsəs, kəˈθɑːsɪs $ -ɑːr-/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Modern Latin ; Origin: Greek , from kathairein 'to make clean or pure' , from katharos 'pure' ]
formal the act or process of removing strong or violent emotions by expressing them through writing, talking, acting etc:
Music is a means of catharsis for me.