Difference between new operator and operator new

Question

What is difference between "new operator" and "operator new"?

Answer 1

"operator new"

class Foo
{
public:
        void* operator new( size_t );
}

"new operator":

Foo* foo = new Foo();

In this example, new Foo() calls Foo::operator new()

In other words, "new operator" calls "operator new()" just like the + operator calls operator +()