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Operator (Noun)

Someone who owns or operates a business; "who is the operator of this franchise?".

Nouns denoting people.

(mathematics) a symbol or function representing a mathematical operation.

Nouns denoting relations between people or things or ideas.

The sine function is a trigonometric operator used to find the ratio of the opposite side to the hypotenuse in a right triangle.
The logarithmic operator is denoted by the symbol log and is used to find the exponent to which a base number must be raised to obtain a given value.
The differentiation operator, often represented by the symbol ∂ or d, is used to find the derivative of a function.
In quantum mechanics, the Hamiltonian operator represents the total energy of a physical system and is used to predict the time-evolution of the system.
The factorial operator, denoted by the symbol !, is used to find the product of all positive integers up to a given number.