The glossary is often found at the end of a book or article and is usually in alphabetical order. A glossary can also come at the end of a chapter or even in footnotes.
Where is the glossary placed?
You place the glossary at the beginning of the document, just after the table of contents (or, if applicable, the list of figures or list of abbreviations). Readers of your dissertation can then first look through the key terms before they actually read your dissertation in full.
Is a glossary in the front or back?
The glossary is found in the back matter of the book. The back matter (which comes after the story; the front matter comes before) also includes such sections as the epilogue, afterword, and appendix.