I find it surprising that, among educators, metacognition (directed thinking about thinking) has been a term of art for years, yet the word is rarely included in dictionaries.
Metacognition is supposedly the highest level of thinking.

I wonder what thinking about one's thinking about thinking would be? Meta-meta-cognition? Or mebbe just metameta for short.

Just thought some mention of metacognition should at least make a cursory appearance here on the Meta-words forum.

MM (That's WW upside-down for MetaMeta; please don't make any meathead jokes.)