[RightWhale]

The only definition is that it is conserved, and that is a law. Whatever it is. Energy has a thousand different looks. Kinetic energy is far from the whole story.

[PatrickHenry]

"Yet Another Lone Genius Solves Everything" Ping List Don't ask to be added to or dropped from this list; I know what you like.

[inquest]

The only definition is that it is conserved, and that is a law.

That's a consequence of the definition, not the definition itself. The scientific definition of energy is the capacity to do work, and work is defined as a force applied through a given distance. And force is defined as that which causes mass to accelerate, and that means time has to be a factor.