Metalanguage is any natural or artificial language by means of which another language is described .In the most general sense, the meta-language is a language for describing some of any language. Described language is called target language. These languages are described by objects, events, state of the world. That is why it is descriptive. Metalanguage commonly referred to a language via a language . Normally, it denotes a language on an object language in terms of language on non-linguistic objects.