reg‧u‧la‧tor AC /ˈreɡjəleɪtə, ˈreɡjʊleɪtə $ -ər/ noun [countable]
[Word Family: noun: regulation, regulator; verb: regulate; adjective: regulatory]

1. an instrument for controlling the temperature, speed etc of something:
a heat regulator

2. someone who makes sure that a system operates properly or fairly:
traffic safety regulators

[TahlilGaran] Dictionary of Contemporary English ▲