adjective. Relating to or advocating interventionism.

noun. One who favors or advocates interventionism.

noun. One who organizes or leads interventions, as in confronting a person's substance abuse.

noun. In medicine, one who favors interfering with the course of a disease for therapeutic purposes under certain circumstances, as contrasted with one who under these circumstances would leave the patient to nature.

noun. One who practices or defends interventionism.

"To keep attention focused on the use of governmental power by economic actors for their ends, the term interventionist power may be used."