This document provides an overview of the tort of defamation under Australian law. It defines defamation and explains that it aims to protect an individual's reputation from false statements that damage their standing in the community. Defamation can be libel (written statements) or slander (spoken statements). To prove defamation, the plaintiff must show publication of the statement and identification of themselves. There are several defenses available, including justification (if the statement is true), qualified privilege (in certain limited situations), and honest opinion (if the statement was an expression of opinion on a matter of public interest). The document also notes some problems with defamation law, such as the potential restriction on freedom of speech.