If you are looking for a Māori word with a similar meaning, "mua" might be close. It means "before," "ahead," or "in front."
However, the closest Māori equivalent to the concept of "meta" would likely depend on the specific context in which you are using it.
For example, "meta" in "metaverse" might be translated as "ā-nō" (meaning "virtual" or "beyond the physical").
Ultimately, the best translation would depend on the specific meaning you are trying to convey.