Metatheory

A metatheory or meta-theory is a theory the subject matter of which is theory itself, for example as an analysis or description of existing theory.. More specifically, if the subject matter of theoretical statement consists of one or multiple theories, it would be called a meta-theory . For mathematics and mathematical logic, a metatheory is a mathematical theory about another mathematical theory. Meta-theoretical investigations are part of the philosophy of science. The topic of metascience is an attempt to use scientific knowledge to improve the practice of science itself.

This article is about theories about theories. For the concept in logic, see Metatheorem.

The study of metatheory became widespread during the 20th century after its application to various topics, including scientific linguistics and its concept of metalanguage.

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