Freedom of Expression

Right to express one's ideas and opinions freely through speech, writing, and other forms of communication but without deliberately causing harm to others' character and/or reputation by false or misleading statements.

Freedom of speech is the concept of being able to speak freely without censorship. The right to freedom of speech is guaranteed under international law through numerous human rights instruments, notably under Article 19 of the Universal Declaration of Human Rights and Article 10 of the European Convention on Human Rights

http://www.derechos.org/human-rights/speech/