What is the definition of an appendix in a book or document?

The correct definition of an appendix in a book or document refers to a table of additional material placed at the end. An appendix serves as a supplementary section where readers can find extra information that supports the main text without interrupting its flow. This material can include data, detailed explanations, charts, or other relevant resources that enhance the understanding of the subject matter discussed in the main body of the document.

This structure allows authors to include comprehensive details that might otherwise be too lengthy or tangential for inclusion in the main chapters, thereby keeping the narrative focused and concise. Readers can consult the appendix as needed for further insights or reference, which is why it plays a significant role in scholarly and technical writing.