operator

noun

op·​er·​a·​tor ˈä-pə-ˌrā-tər 

ˈä-ˌprā-

1

: one that operates: such as

a

: one that operates a machine or device

b

: one that operates a business

c

: one that performs surgical operations

d

: one that deals in stocks or commodities

2

a

: mountebank, fraud

b

: a shrewd and skillful person who knows how to circumvent restrictions or difficulties

3

a

: something and especially a symbol that denotes or performs a mathematical or logical operation

b

: a mathematical function

4

: a binding site in a DNA chain at which a genetic repressor binds to inhibit the initiation of transcription of messenger RNA by one or more nearby structural genes

called also operator gene

compare operon

operatorless adjective

Examples of operator in a Sentence

the operator of an automobile

the operator of a nuclear power plant

Call the operator for the phone number.

Operator, please connect me with extension 123.

She's quite an operator—no one else could have gotten them all to agree to the project.

Recent Examples on the Web

At hotels, which have been ditching items like free soaps and even bathroom doors to economize, the free breakfast is a sacred cow that some worry will not survive, increasingly seen by hotel operators as an money pit eating into the thin margins of the business. —Kevin Williams, CNBC, 15 Feb. 2026

The system is intended to be overseen by a single remote human operator who can monitor multiple Pulling Guard units simultaneously and has the final authority to engage any threats. —David Szondy february 15, New Atlas, 15 Feb. 2026

Fruits of his labor Charlie Olson, the longtime operator of Sunnyvale’s Heritage Orchard, recently announced his retirement. —Anne Gelhaus, Mercury News, 15 Feb. 2026

García Harfuch said that in Baja California, those arrested have included leaders and operators from various factions of the Sinaloa cartel, such as Los Mayos, Los Rusos, Los Aquiles and the Arellano Félix Organization. —Alexandra Mendoza, San Diego Union-Tribune, 15 Feb. 2026

Word History

Etymology

borrowed from Late Latin operātor "worker, producer," from operārī "to work, be efficacious" + Latin -tor, agent suffix — more at operate

First Known Use

1598, in the meaning defined at sense 1

Phrases Containing operator

• crane operator
• smooth operator

Rhymes for operator

• activator
• actuator
• agitator
• alligator
• allocator
• alternator
• animator
• annotator
• applicator
• arbitrator
• aspirator
• aviator

Kids Definition

operator

noun

op·​er·​a·​tor ˈäp-(ə-)ˌrāt-ər 

1

: a person who operates something

the operator of an automobile

2

: a person in charge of a telephone switchboard

Medical Definition

operator

noun

op·​er·​a·​tor ˈäp-(ə-)ˌrāt-ər 

1

: one (as a dentist or surgeon) who performs surgical operations

2

: a binding site in a DNA chain at which a genetic repressor binds to inhibit the initiation of transcription of messenger RNA by one or more nearby structural genes

called also operator gene

compare operon