Defamation of character in print would be libel.
http://en.wikipedia.org/wiki/Libel_%28disambiguation%29
Slander
The term for spoken lies about a person is "slander." Slander refers to making false spoken statements that harm someone's reputation.
You can file a defamation lawsuit against the person for making false statements about you. In the lawsuit, you can use words such as defamation, libel (if the false statement was in writing), slander (if spoken), and seek damages for harm caused to your reputation. Be sure to consult with a lawyer for guidance on the specific language to use in your case.
Negative spoken rumors are considered slander. Negative rumors in print are considered libel.
If the defamation (false statements or lies) is spoken then it is considered slander. If the defamation is written, then it is called libel.
Defamation is the wrongful act of injuring someone's reputation by making false statements about them to a third party. This can include both slander (spoken defamation) and libel (written defamation).
If the defamatory words are in print or the media, it is libel. Oral defamatory statements are categorized as slander.
The term for written lies about a person is "libel." Libel refers to a false and defamatory statement that is written and published, harming the reputation of the individual involved.
Slander. SLANDER.
To slander is to say something that is not true. Slander is often used in a political campaign.
Slander and libel are derogatory or harmful remarks. Slander is spoken, and libel is written.
Spoken lies that defame another person are called slander. When the lies are in print or other media, it would be called libel. Various laws either allow defaming insults, or (conversely) allow legal action against them.