interventionist noun 2adjective 1forms 1 noun2 •One who practices or defends interventionism. •A physician who performs minimally invasive procedures using imaging guidance.Interventionists who took longer than average to thrombectomize AVF [arteriovenous fistulas] took longer than average to thrombectomize AVG [arteriovenous grafts]. — 2013 adjective1 •Of or pertaining to interventionism, or an advocate thereof.I don't believe in an interventionist God / But I know, darling, that you do / But if I did, I would kneel down and ask Him / Not to intervene when it came to you — 1997 formsinterventionists