All 3 Uses

sublime
in
The Goldfinch
(Edited)

Glenn Gould at the piano, wild-haired, ebullient, head thrown back, emissary from the realm of angels, rapt and consumed by the sublime!
p. 608.6

sublime = impressively wonderful
Dumb of me not to have seen it earlier, after all the injuries, the crushed leg, the multiple surgeries; adorable drag in the voice, adorable drag in the step, the arm-hugging and the pallor, the scarves and sweaters and multiple layers of clothes, slow drowsy smile: she herself, the dreamy childhood her, was sublimity and disaster, the morphine lollipop I'd chased for all those years.
p. 762.9

sublimity = magnificence
And just as music is the space between notes, just as the stars are beautiful because of the space between them, just as the sun strikes raindrops at a certain angle and throws a prism of color across the sky —so the space where I exist, and want to keep existing, and to be quite frank I hope I die in, is exactly this middle distance: where despair struck pure otherness and created something sublime.
p. 771.1 *

sublime = impressively wonderful

Definitions:

(1) (sublime as in: she is sublime)
impressively wonderful -- often beautiful or morally admirable
(2) (sublime as in: sublime ignorance)
pure or extreme
(3) (meaning too rare to warrant focus)
More rarely, in chemistry or physics, sublime is used to indicate that something changes from a solid into a vapor without first melting; or vaporizes and then condenses right back again. That sense of the word is also often seen in the form sublimate.