What is a scientific definition of energy?

Answer 1

Physics the property of matter and radiation that is manifest as a capacity to perform work (such as causing motion or the interaction of molecules) : a collision in which no energy is transferred.

• a degree or level of this capacity possessed by something or required by a process.

Answer 2

In science, energy is the ability to do work or cause change. It comes in different forms, such as kinetic energy (energy of motion) and potential energy (stored energy), and can be converted from one form to another. Energy is a fundamental concept in physics that underpins many natural phenomena.