Type the term to be defined in bold text. This will help the reader searching through the entries to find the correct word. A glossary term is usually uncapitalized, unless it happens to be a proper name.
Provide a definition for your term. Express this in a single sentence, if possible, and use only words with which your readership will already be familiar. If you can't define the term without using another obscure term, include the secondary term in your glossary as well.
Direct the reader to other related glossary entries, if necessary. Do this if your entry includes unfamiliar terms in the definition or is very similar to a different term found elsewhere in your glossary. If the two terms are synonyms, only provide the full definition under the first of them, putting "See [other term]" as the entry for the second.