physics
Americannoun
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physics
plural
noun
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the branch of science concerned with the properties of matter and energy and the relationships between them. It is based on mathematics and traditionally includes mechanics, optics, electricity and magnetism, acoustics, and heat. Modern physics, based on quantum theory, includes atomic, nuclear, particle, and solid-state studies. It can also embrace applied fields such as geophysics and meteorology
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physical properties of behaviour
the physics of the electron
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archaic natural science or natural philosophy
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The scientific study of matter, energy, space, and time, and of the relations between them.
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The behavior of a given physical system, especially as understood by a physical theory.
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Noun Inflected Forms
Etymology
Origin of physics
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Explanation
Physics is a kind of science, specifically the science of matter and energy and how they interact. Physics is the study of physical matter, energy, and how they work together. Kinetic energy and potential energy are part of physics. Although it may sound really advanced — and it is — physics is involved in everything we do. Champion pool players have a good understanding of how physics influences the movement of the balls. People who design roller coasters better know their physics. And if you've ever rigged up a pulley or a lever, then you've done basic physics.
Vocabulary lists containing physics
Albert Einstein
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A Brief History of Time
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"Roller Girl" by Victoria Jamieson
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Beyond revealing something fundamental about black hole physics, the discovery could help astronomers make much better use of powerful radio telescopes.
From Science Daily ● Oct. 16, 2026
Entanglement is a phenomenon in which quantum systems become linked in ways that cannot be fully explained by classical physics.
From Science Daily ● Oct. 13, 2026
My earliest product ideas, dreamed up more than 60 years ago, fused physics and the culinary arts.
From The Wall Street Journal ● Oct. 13, 2026
It remains one of the clearest demonstrations that the quantum world operates according to rules that go beyond the familiar laws of classical physics.
From Science Daily ● Oct. 13, 2026
Before this new language, clocks could be used to understand the heavens but not terrestrial physics or biology.
From "The Invention of Science" by David Wootton
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.