Definition of "thaumaturgy"

On all subjects known to man, from the Thirty-nine Articles of our English Church, down to pyrotechnics, legerdemain, magic, both black and white, thaumaturgy, and necromancy, he favoured the world (which world was the nursery where I lived amongst my sisters) with his select opinions.

1853, Thomas De Quincey, “Introduction to the World of Strife”, in Autobiographic Sketches (De Quincey’s Works; I), London: James Hogg & Sons, page 40

There were astonishing changes. The small hours found Mr. Maydig and Mr. Fotheringay careering across the chilly market square under the still moon, in a sort of ecstasy of thaumaturgy, Mr. Maydig all flap and gesture, Mr. Fotheringay short and bristling, and no longer abashed at his greatness

1898, H. G. Wells, The Man Who Could Work Miracles