Noun

• S: (n) operator ((mathematics) a symbol or function representing a mathematical operation)
• S: (n) operator, manipulator (an agent that operates some apparatus or machine) "the operator of the switchboard"
• S: (n) operator (someone who owns or operates a business) "who is the operator of this franchise?"
• S: (n) hustler, wheeler dealer, operator (a shrewd or unscrupulous person who knows how to circumvent difficulties)
• S: (n) operator (a speculator who trades aggressively on stock or commodity markets)