It's a well-known fact that the evil Discovery Institute uses a very narrow definition of creationism, so as to claim that they certainly aren't creationists. Fortunately, we have the pro-science Rev. J. D. Wright to give us the correct definition of creationism:
Creationism is not "the belief that the universe was created by a supreme being or deity". That God is the creator of all things is the first article of the Apostles and Nicene Creeds, and so it is presumably the faith of all Christians, many of whom also accept evolution, and see no conflict between the two.
Creationism is rather the belief that God created the world exactly in the way described in Genesis chapter one (strangely, always ignoring the completely different account in chapter two), with all species exactly as they are today, and that therefore evolution cannot have happened, despite all the evidence.
I believe that should settle it. (HT: Red State Rabble)