Definition of superessential in US English:

superessential

adjective

  • That is above essence; transcending all being, or all that exists.

Origin

Late Middle English; earliest use found in Treatise Perfection Sons of God. From post-classical Latin superessentialis from classical Latin super- + essentia + -ālis, after Byzantine Greek ὑπερούσιος transcending substance or being, used of God.