1. the science of matter and energy and of interactions between the two, grouped in traditional fields such as acoustics, optics, mechanics, thermodynamics, and electromagnetism, as well as in modern extensions including atomic and nuclear physics, cryogenics, solid-state physics, particle physics, and plasma physics.
2. physical properties, interactions, processes, or laws: the physics of supersonic flight.
3. archaic the study of the natural or material world and phenomena; natural philosophy.

1. the branch of science concerned with the study of properties and interactions of space, time, matter and energy.
2. of or pertaining to the physical aspects of a phenomenon or a system, especially those studied in physics.
3. plural form of physic.
4. third-person singular simple present indicative form of physic.

1. 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.

1. natural philosophy; experimental philosophy; the science of the principles operative in inorganic nature; the science of forces or forms of energy. ; ;

1. the physical properties, phenomena, and laws of something
2. the science of matter and energy and their interactions