(philately, 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.
Other Word Forms of Illegal
Origin of Illegal
From French illégal, from Medieval Latin illegalis. In senses relating to immigration, via clipping from illegal alien or illegal immigrant.
Find Similar Words
Find similar words to illegal using the buttons below.