operator

American  

[op-uh-rey-ter] / ˈɒp əˌreɪ tər /

noun

1. a person who operates a machine, apparatus, or the like.

   a telegraph operator.

2. a person who operates a telephone switchboard, especially for a telephone company.

3. a person who manages a working or industrial establishment, enterprise, or system.

   the operators of a mine.

4. a person who trades in securities, especially speculatively or on a large scale.

5. a person who performs a surgical operation; a surgeon.

6. Mathematics.

   1. a symbol for expressing a mathematical operation.

   2. a function, especially one transforming a function, set, etc., into another.

      a differential operator.

7. Informal.

   1. a person who accomplishes goals or purposes by devious means; faker; fraud.

   2. a person who is adroit at overcoming, avoiding, or evading difficulties, regulations, or restrictions.

   3. a person who is extremely successful with or smoothly persuasive to potential sexual or romantic partners.

8. Genetics. a segment of DNA that interacts with a regulatory molecule, preventing transcription of the adjacent region.

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operator British  

/ ˈɒpəˌreɪtə /

noun

1. a person who operates a machine, instrument, etc, esp, a person who makes connections on a telephone switchboard or at an exchange

2. a person who owns or operates an industrial or commercial establishment

3. a speculator, esp one who operates on currency or stock markets

4. informal a person who manipulates affairs and other people

5. maths any symbol, term, letter, etc, used to indicate or express a specific operation or process, such as Δ (the differential operator)

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operator Scientific  

/ ŏp′ə-rā′tər /

1. Mathematics A function, especially one from a set to itself, such as differentiation of a differentiable function or rotation of a vector. In quantum mechanics, measurable quantities of a physical system, such as position and momentum, are related to unique operators applied to the wave equation describing the system.

2. A logical operator.

3. Genetics A segment of chromosomal DNA that regulates the activity of the structural genes of an operon by interacting with a specific repressor.

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Other Word Forms

• preoperator noun
• self-operator noun

Etymology

Origin of operator

First recorded in 1590–1600; from Late Latin, equivalent to operā(rī) “to work, effect” ( operate ) + Latin -tor noun suffix ( -tor )

Example Sentences

People who placed the flurry of futures trades beforehand likely pocketed tens of millions of dollars, according to calculations by a market operator for AFP.

From Barron's

Carnival stock slide after the cruise operator cut its fiscal-year earnings guidance.

From Barron's

“While it does not make the lethal decision-making for selecting and approving targets, Palantir’s Maven system assists the US military operators with making more informed decisions for military operations,” wrote Wedbush analyst Daniel Ives.

From Barron's

Carnival stock slide after the cruise operator cut its fiscal-year earnings guidance.

From Barron's

The cruise operator is at least looking to add valuable experience—both for the future and to better handle the developing crisis.

From Barron's

Related Words

• agent
• broker
• dealer
• driver
• manager