Here are some defenitions gathered from the web to help better understand the meaning of physics...

the science of matter and energy and their interactions
http://www.cogsci.princeton.edu/cgi-bin/webwn

Physics (from the Greek, φυσικός (physikos), "natural", and φύσις (physis), "Nature") is the science of Nature in the broadest sense. Physicists study the behavior and properties of matter in a wide variety of contexts, ranging from the sub-microscopic particles from which all ordinary matter is made (particle physics) to the behavior of the material Universe as a whole (cosmology).
http://en.wikipedia.org/wiki/Physics

the study of matter and energy.
http://www.artsconnected.org/artsnetmn/spaces/vocabulary.html

Discipline of Science dealing with the properties of matter and energy. Includes; acoustics, atomic physics, cryogenics, electromagnetism, elementary particle physics, fluid dynamics, geophysics, mathematical physics, mechanics, molecular physics, nuclear physics, optics, plasma physics, quantum physics, solid state physics, statistical mechanics, thermodynamics.
http://www.embassy.org.nz/encycl/p4encyc.htm

The scientific study of matter, energy, motion, and force. (From a Greek term meaning "the science of nature.")
http://eobglossary.gsfc.nasa.gov/Library/glossary.php3

The quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter. It is measured in grams in the SI system of measurement. Note Mass and weight are often used, in a general way, as interchangeable terms, since the weight of a body is proportional to its mass (under the same or equal gravitative forces), and the mass is usually ascertained from the weight. Yet the two ideas, mass and weight, are quite distinct. Mass is the quantity of matter in a body; weight is the comparative force with
http://dictionary.new-frontier.info/Mass

The science dealing with the properties, changes, interactions, etc. of matter, and energy in which energy is considered to be continuous (classical) or discrete (quantum)
http://library.thinkquest.org/10401/vocab.html

a science that deals with matter and energy and their actions upon each other in the fields of aeronautics, electricity, heat, light, mechanics, and sound
http://whyfiles.larc.nasa.gov/text/kids/Problem_Board/problems/flight/glossary.html

"The knowledge of things, as they are in their own proper beings, their constitution, properties, and operations ..."
http://www.explore-dictionary.com/science/S/Semiotics.html

acoustics; atomic and molecular; condensed matter; elementary particle; nuclear structure; optics; plasma
http://www.nsf.gov/sbe/srs/fedfunds/pubs/dst42/technote/fields.htm

The positively charged central region of an atom, composed of protons and neutrons and containing almost all of the mass of the atom.
http://www.yourdictionary.com/ahd/n/n0188200.html

"Right now the influence of physics appears to be infinite. The products that surround us and the ones being conceived are the results of applying the laws of physics in unique and utilitarian ways. Physics has become the science of our everyday life. " - [Author]
http://edstar.ncrel.org/mn/MNGrade.asp

Quantification and measurement of physical things in order to describe relationships or laws between them.
http://www.cosmicledger.com/glossary/p.html

the horizontal component of the earth's magnetic force.
http://www.webster-dictionary.net/definition/horizontal

(a mother of theories) : Grand unification theory | Quantum field theory | String theory | Superstring theory | Theory of relativity | Acoustic theory | Antenna theory | Theory of everything (TOE) | Kaluza-Klein theory | M-theory | Loop quantum gravity theory | special theory of relativity | general theory of relativity | Dynamic theory of gravity | Ether theory
http://encyclopedia.laborlawtalk.com/scientific_theory

History of physics, Physics basic topics, Quantum mechanics ( Quantum chromodynamics), Elementary event
http://www.knowlex.org/lang/en/lexikon/Fundamental_force.html

Kennelly-Heaviside Layer, Mad scientist, Microwave, 1850 in science
http://encyclopedia.thefreedictionary.com/Oliver%20Heaviside

flux density
http://www.wordwebonline.com/en/FLUX

The physics of the Stoics was, on the whole, identical with their theology, in which the formative power that makes each thing what it is and harmonizes all things was God. The key words in the Stoic vocabulary are all basically synonymous: God, Zeus, creative fire, ether, the word (logos), reason of the world, soul of the world, law of nature, providence, destiny, and order. The Stoics were monists. There is in their physics no qualitative difference between God and the rest of the universe; God is only the most tense (cohesive) creative aspect of the universe. The stuff which
http://zork.cs.uvic.ca/quotes/stoics_encyclopedia.html

Forums is a network of science forums with an emphasis on physics help and math help. Register to post your physics questions or just hang out and talk about general science topics!
http://www.physicsforums.com/physics-glossary-T.html

The study of the properties of
http://matter.nandankanan.tripod.com/scienceterms.htm

Scientific method | Wave-particle duality | Crookes radiometer
http://encyclozine.com/James_Clerk_Maxwell