[Item] Database [Description] 
The uninstall process does not affect the Master Data Services database. The database remains intact in the instance of Database Engine so that you do not lose any data, including master data, model objects, user and group permissions, business rules, and so on. If you do not need the database, and do not anticipate connecting it to another Master Data Services Web site or application in the future, you might want to delete the database from the instance of Database Engine that hosts it. For more information, see How to: Delete a Database (SQL Server Management Studio).