A person who enters and lives in a country in violation of that country's laws.

an invader whose actions infringe on the rights not only of citizens but also legal immigrants who play by the rules

a non-citizen who has entered the United States without government permission or stayed beyond the termination date of a visa

a non-national who enters or seeks to enter or has entered the State unlawfully

a person that has immigrated to the UK illegally

a person who either enters a country illegally, or who enters legally but subsequently violates

a term used to describe somebody who enters a country and takes up residence there without proper legal status

One who enters the United States without inspection or without an appropriate visa authorizing entry.

a person who enters a country without inspection, or a person who enters a country with proper legal documentation and then overstays the legally prescribed duration of their visit.