Dictionary is the section of Video Starter Kit that store list of keywords that can be used for screening user posted contents or for user identity validation at time of registration process.
The are two task handle by Dictionary Management.
Restricted User Names:
Administrator can use dictionary management section to add list of restricted usernames to prevent users to take it for their identity on website. This help administrators to prevent usernames such as "moderators, administartors, admin, guest, tester, etc"
Dictionary Management is located at control panel / settings / Dictionary section.