A state-imposed restriction on the content of speech, esp. when the speech concerns something of slight social value and is vastly outweighed by the public interest in morality and order.
• Types of speech subject to content-based discrimination include obscenity, fighting words, and defamation. R.A.V. v. City of St. Paul, 505 U.S. 377, 383–84, 112 S.Ct. 2538, 2543 (1992).