Ostracism
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( n.) Banishment by popular vote, - a means adopted at Athens to rid the city of a person whose talent and influence gave umbrage.
(2): ( n.) Banishment; exclusion; as, social ostracism.
The Nuttall Encyclopedia [2]
Banishment (lit. by shell) for a term of years by popular vote from Athens of any individual whose political influence seemed to threaten the liberty of the citizens; the vote was given by each citizen writing the name of the individual on a shell and depositing it in some place appointed, and it was only when supported by 6000 citizens that it took effect.