obscenity, in law, anything that tends to corrupt public morals by its indecency. The moral concepts that the term connotes vary from time to time and from place to place. In the United States, the word obscenity is a technical legal term. In the 1950s the U.S. Supreme Court began to relax rules prohibiting the possession, sale, and distribution of obscene material, often called pornography, but in 1973 that trend was reversed. The court ruled that material that appealed to prurient interest in sex and that did not have serious literary, artistic, political, or scientific value could be banned as obscene. It ruled that a national definition of obscenity was not necessary and, therefore, that communities could develop local standards within the court's guidelines. The legal determination that material falls within a definition of obscenity is usually made by a jury.
See H. M. Clor, Obscenity and Public Morality (1969, repr. 1985); D. S. Moretti, Obscenity and Pornography (1984).