Defamation—also calumny, vilification, and traducement—is the communication of a false statement that harms the reputation of an individual person, business, product, group, government, religion, or nation.

Libel! is a play written by Edward Wooll. It debuted on 2 April 1934 at the Playhouse Theatre in London's West End, where it was directed by Leon M. Lion. Producer Gilbert Miller brought it to Henry Miller's Theatre on Broadway in December 1935, with Otto Preminger directing.