1. the act of rejecting someone from membership in a club or organization by secret ballot
2. the act of boycotting or shunning someone socially or professionally

1. present participle of blackball: to reject someone from membership or exclude them socially

Examples

• The country club’s blackballing of new members was based on outdated traditions.
• His blackballing from the professional association hurt his career prospects.
• The committee was accused of blackballing qualified candidates for personal reasons.
• She feared that speaking out would result in her blackballing from the industry.
• The fraternity’s blackballing process was kept completely secret.
• They are blackballing him because of his controversial statements.
• The blackballing of the whistleblower sent a clear message to other employees.