In epistemology the prefix meta- is used to mean about (its own category). For example, metadata is data about data (who has produced it, when, what format the data is in and so on). Similarly, meta-memory in psychology means an individual’s intuition about whether or not they would remember something if they concentrated on recalling it. Any subject can be said to have a meta-theory, which is the theoretical consideration of its foundations and methods.
Metaphotos:
