The definition of glossary is a list of words and their meanings.
The alphabetical listing of difficult words in the back of a book is an example of a glossary.
a list of difficult, technical, or foreign terms with definitions or translations, as for some particular author, field of knowledge, etc., often included in alphabetical listing at the end of a textbook
Origin of glossaryMiddle English glosarie ; from Classical Latin glossarium ; from glossa: see gloss
A list of often difficult or specialized words with their definitions, often placed at the back of a book.
Origin of glossaryMiddle English glosarie, from Latin glōssārium, from glōssa, foreign word; see gloss2.
From Latin glossārium, from Ancient Greek γλῶσσα (glossa, “tongue”).