illegal

sifat adjective

1. Contrary to or forbidden by law, especially criminal law. Nearly 40 million people live in UK areas with illegal air pollution
2. Forbidden by established rules. Moving a pawn backward is an illegal move in chess.
3. (of a person, sometimes offensive) Being or doing something illegally. illegal immigrant;  illegal logger;  illegal pilot
4. (of an issue printed for collectors) Totally fictitious, and often issued on behalf of a non-existent territory or country.

ot noun

1. An illegal act or technique.
2. (plural, as illegals) Contraband, esp. illegal substances such as drugs.
3. An illegal immigrant.
4. A spy working abroad illegally and undercover, without visible ties to his or her country’s authorities.