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operator

n.
1.(mathematics) a symbol that represents a function from functions to functions
2.an agent that operates some apparatus or machine
3.someone who owns or operates a business
4.a shrewd or unscrupulous person who knows how to circumvent difficulties
5.a speculator who trades aggressively on stock or commodity markets

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    Idiom of the Day

    little frog in a big pond
    an unimportant person in a large group or organization
    The manager transferred to the head office but now he is a little frog in a big pond and nobody knows him.



    1.
    ________ President of the United States will be visiting Australia next week.

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