Definition of "cathartic"

"So, there are real opportunities to create real change with enforcement." Prosser describes how some of that change is also cathartic to those who have been directly affected by incidents on the railway, such as the families who have lost loved ones.

2023 November 1, Ian Prosser talks to Stefanie Foster, “Safety Mission: Possible”, in RAIL, number 995, page 37

The disease was regarded as pneumonia so far advanced that suppuration seemed to have supervened; bleeding, blisters, expectorants, and cathartics diminished the symptoms; the pulse continued frequent, hard, full, but always regular.

1833, R. J. Bertin, translated by Charles W. Chauncy, Treatise on the Diseases of the Heart, and Great Vessels, Philadelphia: Carey, Lea & Blnachard, page 165