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Meta This article is about the word or prefix Meta. For other uses, see Meta (disambiguation). Meta (from Greek: μετά = "after", "beyond", "with"), is a prefix used in English in order to indicate a concept which is an abstraction from another concept, used to complete or add to the latter. The Greek meta is equivalent to the Latin post. In epistemology, the prefix meta- is used to mean about (its own category). For example, metadata are data about data (who has produced it, when, what format the data are in and so on). Similarly, metamemory in psychology means an individuals knowledge about whether or not they would remember something if they concentrated on recalling it. Furthermore, metaemotion in psychology means an individuals emotion about his/her own basic emotion, or somebody elses basic emotion.[citation needed]. Any subject can be said to have a meta-theory, which is the theoretical consideration of its foundations and methods. Another, slightly different interpretation of this term is "about" but not "on". For example, a grammar is considered as a metalanguage, a meta-answer is not a real answer but a reply, such as: "this is not a good question", "I suggest to ask your professor". Here, we have such concepts as meta-reasoning and meta-knowledge