Meaning of “regulator” - Learner’s Dictionary

regulator

noun [ C ] uk us /ˈreɡjəleɪtər/
OFFICIAL

someone whose job is to make sure that a system works in a fair way:

the water industry regulator
EQUIPMENT

a piece of equipment that is used to control the temperature, speed, etc of something

(Definition of “regulator” from the Cambridge Learner’s Dictionary © Cambridge University Press)