ostracism

The act of banishing or excluding.

Banishment or exclusion from a group; disgrace.

In Athens and other cities of ancient Greece, the temporary banishment by popular vote of a citizen considered dangerous to the state.

A political measure employed under restrictions of law among the ancient Athenians, by which citizens whose presence seemed embarrassing to the state were banished by public vote for a term of ten years, with leave to return to the enjoyment of their estates at the end of the period.

Hence Banishment in general; expulsion; separation.