Definition of "supernal"

[…] and there, after due prayers to the gods who dwell in ether supernal, had taken solemn counsel whereby they might, if so be it might be, bring once more into honour among mortal men the winged speech of the seadivided Gael.

1922 February, James Joyce, Ulysses, Paris: Shakespeare and Company, […]

Even the sunlight assumed a supernal glamour, as if some special atmosphere or exhalation mantled the whole region.

1931, H. P. Lovecraft, “chapter 6”, in The Whisperer in Darkness

Pig, not normally reticent in these matters, now acted like a mystic after a vision; unable, maybe unwilling, to put in words this ineffable or supernal talent of Panky’s.

1963, Thomas Pynchon, V.

For what did Cauchy know, or Christoffel,Or Fourier, or any Boole or Euler,Wielding their compasses, their pens and rulers,Of thy supernal sinusoidal spell?

1974, Michael Kandel, The Cyberiad, translation of original by Stanisław Lem