A blacklist (or black list) is a list or register of entities or people who, for one reason or another, are being denied a particular privilege, service, mobility, access or recognition. As a verb, to blacklist can mean to deny someone work in a particular field, or to ostracize a person from a certain social circle. Conversely, a whitelist is a list or compilation identifying entities that are accepted, recognized, or privileged. "Whitelist" and "blacklist" are widely considered controversial terms by someTemplate:Who? because of how they reinforce an implicit association in language between "black" and "bad" on the one hand, and "white" and "good" on the other.