English to English
1. the science of matter and energy and their interactions
his favorite subject was physics
2. the physical properties, phenomena, and laws of something
he studied the physics of radiation
3. The science of nature, or of natural objects; that branch of science which treats of the laws and properties of matter, and the forces acting upon it; especially, that department of natural science which treats of the causes (as gravitation, heat, light, magnetism, electricity, etc.) that modify the general properties of bodies; natural philosophy.