Seditious libel is a criminal offence under common law of printing written material with seditious purpose – that is, the purpose of bringing contempt upon a political authority. It is still an offence in Canada but has been abolished in England and Wales, although similar provisions continue to exist under different wording in other statutes.
American scholar Leonard W. Levy argues that seditious libel "has always been an accordion-like concept, expandable or contractible at the whim of judges".