Wikipedia:
Physics is the study of matter, motion and energy.
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alt.S.defs:
Physics is the study of natural abiotic dynamics.
Physics is a plot to expose every universal law, true constant, and eternal ratio.
Physics is an ongoing effort to write a technical user’s manual for the universe.
Physics is the contextual study of matter and energy moving in time and space.
Physics is the rationality of actuality.
Physics is the study of inanimate behaviours.
Physics is a science in search of its own meaning.
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unrelated rant:
I think it’s unfair that Space gets three dimensions, while Time gets but one.
What is Space, anyway? A whole lot of nothing! And it’s like that in every direction, as far as the eye can see — or the mind imagine. Even if you fill it up with stuff, without time, nothing will ever happen there. And yet, man, in his ‘wisdom’, has seen fit to confer upon this vast and virtual wasteland the lavish gift of three full axes!
To its credit, though, Time takes no offense, seemingly secure in the knowledge that its unitary comportment is perfectly the match of its partner’s triplicity.
imahd.ca 