If you Google the term data dictionary, you will get 100 or more results of definitions that generally mean the same thing. A "data dictionary" is data about data. It is what defines the items in your ...

A data dictionary is like a bill of materials for a database; it lists all database components, including reports, tables, field names and field types. Such information helps audit databases for ...

A database about data and databases. A data dictionary holds the name, type, range of values, source and authorization for access for each data element in the organization's files and databases. It ...