Banishment

expatriation

the process of abandoning one’s native land or of being exiled. —expatriate, n., adj., vb.

ostracism

1. a casting out from social or political society.

2. the ancient Athenian process of temporary banishment by popular vote, using potsherds or tiles for ballots.

petalism

the banishing of a citizen for five years if judged guilty of dangerous influence or ambition, as practiced in ancient Syracuse; olive leaves were used for ballots.