To deport someone means to officially force them to leave a country and return to their homeland. When a government deports a person, it's sending them back to the country where they hold citizenship, usually because they entered or stayed illegally, or because they committed serious crimes.

Deportation is different from simply asking someone to leave. It's a formal legal process carried out by immigration authorities. A country might deport someone who entered without permission, overstayed their visa, or violated the terms of their legal stay. In some cases, even people who entered legally can be deported if they're convicted of certain crimes.

Throughout history, governments have deported people for various reasons: Ancient Rome deported political opponents to distant islands, and colonial powers deported prisoners to faraway territories, including Australia.

Today, deportation remains controversial because it separates families and affects people's lives dramatically. Someone who has lived in a country for years, built a life there, and raised children might face deportation for violations of immigration law. Countries must balance enforcing their borders and laws with the human impact of sending someone away from the home they've built.