noun
In constitutional law, a restriction on the exercise of free speech based upon
the subject matter or type of speech. Such a restraint is permissible only if
it is based on a compelling state interest and is so narrowly worded that it
achieves only that purpose. For example, a statute cannot ban all public
demonstrations, peaceful or otherwise, on the subject of gun control while
allowing demonstrations concerning other topics of controversy. However, a
statute can ban all inflammatory speeches, regardless of the topic, that might
incite imminent violence. Also called content discrimination. See also
discrimination.