RhymeZone: operators definitions

Definitions of operator:

noun: an agent that operates some apparatus or machine
Example: "The operator of the switchboard"
noun: someone who owns or operates a business
Example: "Who is the operator of this franchise?"
noun: a speculator who trades aggressively on stock or commodity markets
noun: (mathematics) a symbol that represents a function from functions to functions
Example: "The integral operator"
noun: a shrewd or unscrupulous person who knows how to circumvent difficulties