controller meaning and definition

CONTROLLER noun

Definition of controller (noun)

1. someone who maintains and audits business accounts
   • synonyms: accountant, comptroller
2. a person who directs and restrains
   • synonyms: restrainer
3. a mechanism that controls the operation of a machine
   • "the speed controller on his turntable was not working properly"; "I turned the controls over to her"
   • synonyms: control