operator

/ˈɑp·əˌreɪt̬·ər/ n [C]

Definition

› a person who makes something work or puts something into action: a computer/machine operator › An operator is also a person who works on a telephone switchboard: Dial or press zero for the operator. › usually disapproving An operator is a person who is often successful but seems too intelligent or speaks and acts too quickly and may not always be honest: He’s a smooth operator.

(Definition of operator n from the Cambridge Academic Content Dictionary © Cambridge University Press)