Definition of "dæmon"

Edmund was almost as welcome to his brother, as Fanny to her aunt; but Mrs. Norris, instead of having comfort from either, was but the more irritated by the sight of the person whom, in the blindness of her anger, she could have charged as the dæmon of the piece.

1814 July, [Jane Austen], chapter XVI, in Mansfield Park: […], volume III, London: […] T[homas] Egerton, […], page 299

It was their opinion, and that of all similar sects, that cœlestial powers were often incarnate and came from time to time to rule the earth, dæmon kings whose conception and aphanism were alike miraculous.

1829, Algernon Herbert, Nimrod, page 67