Historical Definitions:

1) Physical power related to the capacity to shape, order, or manipulate the fabric of reality.

"I see there's virtue in my heavenly words!

Who would not be profficient in this art?

How pliant is this Mephistophelis,

How full of obedience and humility,

Such is the force and magic of my spells."

Doctor Faustus, Christopher Marlowe, 1604.

2) Ethical or moral goodness.