matter - physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy., physics - the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms., atom - the smallest particle of a chemical element that can exist., energy - the strength and vitality required for sustained physical or mental activity., experiment - a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact., observation - a long-term, targeted, and systematic perception of objects or phenomena due to the tasks of certain activity.,

Physics

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