1. in accord with physical laws; - Example: "it is physically impossible"
The Collaborative International Dictionary of English v.0.48:
Physically \Phys"ic*al*ly\, adv.
In a physical manner; according to the laws of nature or
physics; by physical force; not morally.
I am not now treating physically of light or colors.
2. According to the rules of medicine. [Obs.]
He that lives physically must live miserably.
[1913 Webster] physicalness
WordNet (r) 3.0 (2006):
adv 1: in accord with physical laws; "it is physically