libel

Short definition from Wiktionary

Noun

1. 1
   A written or pictorial false statement which unjustly seeks to damage someone's reputation.
2. 2
   The act or tort of displaying such a statement publicly.
3. 3
   Any defamatory writing; a lampoon; a satire.
4. 4
   A written declaration or statement by the plaintiff of their cause of action, and of the relief they seek.
5. 5
   A brief writing of any kind, especially a declaration, bill, certificate, request, supplication, etc.

Verb

1. 1
   To defame (someone), especially in a manner that meets the legal definition of libel.
2. 2
   To proceed against (goods, a ship, etc.) by filing a legal claim.