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1. operator (noun)
a shrewd or unscrupulous person who knows how to circumvent difficulties
2. operator (noun)
an agent that operates some apparatus or machine; "the operator of the switchboard"
Also known as: manipulator
3. operator (noun)
someone who owns or operates a business; "who is the operator of this franchise?"
4. operator (noun)
a speculator who trades aggressively on stock or commodity markets
5. operator (noun)
(mathematics) a symbol that represents a function from functions to functions; "the integral operator"
mathematics / math / maths