+Blackball is the act of deliberately excluding a person from a [group](/wiki/Group) or activity. Often cast in secret, it functions as a potent form of social [rejection](/wiki/Rejection), denying access or opportunity.
+## See also
+- [Exclusion](/wiki/Exclusion)
+- [Ostracism](/wiki/Ostracism)
+- [Secret Ballot](/wiki/Secret_Ballot)
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