(US, derogatory, chiefly in right-wing discourse) A judge or justice who makes rulings based on personal political views or considerations rather than on the law, or who issues rulings intended to have political effects.

plural of activist justice

(US, derogatory, chiefly in right-wing discourse) A justice (usually referring to a member of a Supreme, High or Appellate court) who makes rulings based on personal political views or considerations rather than on the law, or who issues rulings intended to have political effects.

a person or a group purchasing and using an equity stake in a publicly traded corporation to put public pressure on its management, with the goal of effecting a change

plural of activist investor

cyberactivist

A person who takes an active role in animal welfare.