the Hemlock SocietyˈHemlock Soˌciety, the the former name of an organization in the US which aims to change the law that forbids helping seriously ill people to die if they wish to. The organization gives advice to such people and their families. in 2005 the Hemlock Society joined with Compassion In Dying to form an organization called Compassion & Choice. There is a similar organization in the UK called EXIT. → see also euthanasia