Metalanguage (noun)

A language used to make statements about other languages or to describe or criticize their structure or use.

Origin:

Mid 20th century: from meta- "higher" + language.

Examples:

1. The metalanguage of linguistics provides a way to describe and analyze the structure of language.
2. The metalanguage used in computer programming allows developers to create new programming languages.
3. The metalanguage of mathematics is used to define mathematical concepts and symbols.
4. In logic, the metalanguage is used to make precise statements about the structure of arguments.
5. The metalanguage of literary criticism is used to analyze and interpret works of literature.