"The system tables that contain descriptions of the database objects and how they are structured." (Karen Paulsell et al, "Sybase SQL Server: Performance and Tuning Guide", 1996)
"Software in which metadata is stored, manipulated and defined – a data dictionary is normally associated with a tool used to support software engineering." (Keith Gordon, "Principles of Data Management", 2007)
"A list of descriptions of data items to help developers stay on the same track." (Rod Stephens, "Beginning Database Design Solutions", 2008)
"The place where information about data that exists in the organization is stored. This should include both technical and business details about each data element." (Laura Reeves, "A Manager's Guide to Data Warehousing", 2009)
"Data dictionary are mini database management systems that manages metadata. It is a repository of information about a database that documents data elements of a database. The data dictionary is an integral part of the database management systems and stores metadata or information about the database, attribute names and definitions for each table in the database." (Vijay K Pallaw, "Database Management Systems" 2nd Ed., 2010)
"In the days of mainframe computers, this was a listing of record layouts, describing each field in each type of file." (David C Hay, "Data Model Patterns: A Metadata Map", 2010)
"Software coupled with a data store for managing data definitions." (Craig S Mullins, "Database Administration", 2012)
"A database containing data about all the databases in a database system. Data dictionaries store all the various schema and file specifications and their locations. They also contain information about which programs use which data and which users are interested in which reports." (SQL Server 2012 Glossary, "Microsoft", 2012)
"A reference by which a team can understand what data assets they have, how those assets were created, what they mean, and where to find them." (Evan Stubbs, "Delivering Business Analytics: Practical Guidelines for Best Practice", 2013)
"A repository of the metadata useful to the corporation" (Daniel Linstedt & W H Inmon, "Data Architecture: A Primer for the Data Scientist", 2014)
"A comprehensive record of business and technical definitions of the elements within a dataset. Also referred to as a business glossary." (Jonathan Ferrar et al, "The Power of People", 2017)
"A database containing data about all the databases in a database system. Data dictionaries store all the various schema and file specifications and their locations." (BAAN)
"A read-only collection of database tables and views containing reference information about the database, its structures, and its users." (Oracle)
"A set of system tables, stored in a catalog, that includes definitions of database structures and related information, such as permissions." (Microsoft Technet)
"A set of tables that keep track of the structure of both the database and the inventory of database objects." (IBM)
"A specialized type of database containing metadata; a repository of information describing the characteristics of data used to design, monitor, document, protect, and control data in information systems and databases; an application system supporting the definition and management of database metadata." (TOGAF)
"Metadata that keeps track of database objects such as tables, indexes, and table columns." (MySQL)
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