What prefix means meta?

The prefix "meta" itself means "beyond", "about", or "at a higher level". It's not a prefix that's combined with other words to form a new word, but rather a standalone prefix that modifies the meaning of the word it's attached to.

For example:

* Metaphysics: The study of the fundamental nature of reality and existence, going beyond the physical world.

* Metacognition: Thinking about thinking, being aware of one's own cognitive processes.

* Metadata: Data about data, providing information about the content, structure, and other characteristics of a dataset.