1. Etymology: A dictionary entry often includes the origin and history of a word (its etymology), showing how it evolved over time. A glossary entry is focused on the specific meaning of the word within the context of a particular work or subject, so etymology is usually not included.
2. Pronunciation: A dictionary entry will typically provide the pronunciation of a word, using phonetic symbols or other markings. A glossary assumes that the reader already has a general understanding of the pronunciation within the context of the work it accompanies. Therefore, pronunciation is not usually included.