An operator (not to be confused with operation) is a mapping from one vector space or module to another. Operators are of critical importance to both linear algebra and functional analysis. Important properties that various operators may exhibit include linearity, continuity, and boundedness.
OmegaWiki Dictionary
Ω
operator One who operates.
operator A function or other mapping that carries variables defined on a domain into another variable or set of variables in a defined range.
operator A person who provides assistance to a telephone caller by establishing a network connection with the person to be reacher.