Depending on the guidelines that your school provides, the formatting of your essay will differ, but there are a few things your paper will always need. If you used other people's work in your definition essay, you will have to cite it properly. Remember to include footnotes, end notes or in-text citations. Also, you will need to have a bibliography or works cited list at the end of your paper. Your teacher or professor may also want you to annotate your works cited list by writing a couple of sentences about each of your sources and how they contributed to your essay. You will likely also have to provide a title page with the title of your essay, your name, date, class and instructor.