The answer is dictionary.
<span>glossary - an alphabetical list of terms or words found in or relating to a specific subject, text, or dialect, with explanations; a brief dictionary.
</span>
a thesaurus lists words in groups of synonyms and related concepts.
it is not an encylopedia
De·lude<span>dəˈlo͞od/</span>verbimpose a misleading belief upon (someone); deceive; fool. To trick someone