An illegal act or technique.
(plural, as illegals) Contraband, esp. illegal substances such as drugs.
An illegal immigrant.
A spy working abroad illegally and undercover, without visible ties to his or her country’s authorities.
Contrary to or forbidden 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.
(of a person, sometimes offensive) Being or doing something illegally.
(sometimes offensive) Being an illegal immigrant; residing in a country illegally.