Seditious libel (n.) is the one charge where truth is no defense — truth makes it worse, since a true criticism undermines the state all the more.
5 definitions
Seditious libel (n.) makes criticism of government a crime; it is the hallmark of closed societies, and America ruled it out only in 1964.
Seditious libel (n.) is the test of a free society: where you can be punished for criticizing the government, even in the background, the society is not free.
Seditious libel (n.) is the old doctrine under which truth was no defense — it only made the crime of discrediting authority worse.
Seditious libel (n.) is the idea that speech can criminally assault the state — the hallmark of closed societies; a society that tolerates it is not free.