Wiktionary
n. As much as a sky will hold.
Usage examples of "skyful".
Mu Olokukurtilisop Among the Cuna of the Isthmus of Panama, this was the name of the great preexistent goddess who parthenogenetically produced the sun, took him as her lover, birthed the moon and mated with him, and thus produced the entire skyful of stars.
There she was, a small dot of light ten degrees across the sky from the gleaming bulk of a nearly full Moon, a skyful of familiar old stars glowing warm and bright between them.
I looked, and there were horses, horses everywhere--a whole skyful of horses dancing round me.
Earth is a quiet, rather idyllic world these days-a skyful of ragged cities will create a lot of alarm there.
He eyed the skyful of stars and fantasized about flying her somewhere deserted and making love out in the open.