Deportation, means the removal of someone from a country. People may be deported from a country for many reasons. For example, one may be deported from a country if they enter the country using illegally or if they overstay longer then their visa allows them to stay in the country.
Deportation can also happen inside a country. A person or a group of people may be forced to move to a different part of the country, as a type of punishment.