blacklist

A blacklist is a list of individuals, groups, organizations, or entities that are prohibited from certain activities due to negative judgments or past actions. For instance, in technology, a software blacklist may prevent specific applications from running on a computer because they are deemed harmful. In employment, a blacklist might keep certain people from being hired based on their previous behavior. The purpose of a blacklist is often to protect interests, enhance security, or maintain standards by excluding those who are considered untrustworthy or problematic.