operator
n 1: (mathematics) a symbol that represents a function from
functions to functions; "the integral operator"
2: an agent that operates some apparatus or machine; "the
operator of the switchboard" [syn: {manipulator}]
3: someone who owns or operates a business; "who is the
operator of this franchise?"
4: (informal) a shrewd or unscrupulous person who knows how to
circumvent difficulties [syn: {hustler}, {wheeler dealer}]
5: a speculator who trades aggressively on stock or commodity
markets