regulator
🇺🇸
/ˈreɡjuleɪtər/
🇬🇧
/ˈreɡjuleɪtə(r)/
A person or group that makes sure businesses follow rules and act fairly.
The government regulator checks that companies treat customers fairly.
A device that controls how fast, hot, or pressurized something is.
The pressure regulator keeps the water flowing at a safe level.