Postface is a term that is used in literature to refer to the section of a book that appears after the main body of text has concluded. It typically provides additional information and details that are related to the content of the book. However, there are other terms that can be used synonymously with postface, such as afterword, epilogue, conclusion, addendum, and appendix. While they have slightly different connotations, all of these words refer to a section of a book that appears after the main text has ended and provides supplementary information. Choosing the appropriate term largely depends on the author's intention and the specific content of the section.