illegal🔊

Contrary to, forbidden, or not authorized by law, especially criminal law.

Forbidden by established rules.

(of an issue printed for collectors) Totally fictitious, and often issued on behalf of a non-existent territory or country.

(offensive) Being or doing something illegally.

(offensive) Being an illegal immigrant; residing in a country illegally. {{rfex|en}}

(obsolete) An illegal act or technique.

(as illegals) Contraband, esp. illegal substances such as drugs.

(offensive) An illegal immigrant.

(espionage) A spy operating abroad illegally and under non-official cover, without visible ties to his or her country’s authorities.