MeSH definition : The branch of philosophy that treats of first principles, including ontology (the
nature of existence or being) and cosmology (the origin and structure of the universe).
(From Random House Unabridged Dictionary, 2d ed);
MeSH synonym : metaphysic;
MeSH annotation : only /hist;
Wikipedia link : https://en.wikipedia.org/wiki/Metaphysics;
The branch of philosophy that treats of first principles, including ontology (the
nature of existence or being) and cosmology (the origin and structure of the universe).
(From Random House Unabridged Dictionary, 2d ed)