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
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.