Regulator/ˈreɡjuleɪtər/ Definition 1 of 3Pro Tip 1/3Authority Figure Refers to entities with power to set and enforce rules. The traffic regulator ensures cars follow the road rules. Pro Tip 2/3Control Mechanism Implies active management and adjustment actions. As a regulator in a debate, he kept the discussion balanced. Pro Tip 3/3Balance Maintainer Keeps various aspects in harmony and prevents extremes. A regulator prevents stock market prices from being too volatile.