Physics (noun)

1. The branch of science concerned with the nature and properties of matter and energy.
2. The study of the physical world and its phenomena, including mechanics, heat, light, and sound.
3. The science that deals with matter, energy, motion, and force.

Origin:

Late middle english: from old french fisique, via latin from greek physis "nature".

Examples:

1. He studied physics in college.
2. She is a physics professor.
3. The physics exam was difficult.
4. He likes the theoretical aspect of physics.
5. She works on applied physics research.