Meta-level discussions can concern different basic-level objects: the meta- prefix (Greek for ‘after’, ‘behind’, ‘among’, ‘higher’, ‘beyond’, ‘above’, ‘transcending’, ‘with’) combines comfortably not only in the well-acknowledged “metaphysics,” but in our times with metamathematics, metahistory, metaethics, metalanguage, metacommunication, metasemiotics, metapragmatics, metasemantics, metasyntax, metaknowledge, metaculture, metadata, metacognition, metaexistence, and so forth, enjoying formidable productivity. The compounds display somewhat less consistent compositionality in that the meta-level, arguably always metaphorically (no pun intended) “higher” in some sense than the basic/object level, is sometimes just a level of discourse or description pertaining to “meta-x about an x,” while at other times, more precisely, “meta-x providing the foundations, including methods and justification, for x.”