classical physics

American  

[klas-ik-uhl fiz-iks] / ˈklæs ɪk əl ˈfɪz ɪks /

noun

1. physics as understood before the advent of quantum mechanics and the theory of relativity, or those aspects of contemporary physics that do not involve or rely on these theories.

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classical physics Scientific  

1. Physics that does not make use of quantum mechanics or the theory of relativity. Newtonian mechanics, thermodynamics, and Maxwell's theory of electromagnetism are all examples of classical physics. Many theories in classical physics break down when applied to extremely small objects such as atoms or to objects moving near the speed of light.

2. ◆ Classical mechanics refers to the classical physics of bodies and forces, especially Newton's laws of motion and the principles of mechanics based on them.

3. Compare quantum mechanics

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Other Word Forms

• classical physicist
  noun
• classical-physics
  adjective

Example Sentences

See Examples For:

classical physics

"It's a striking example of how quantum principles can rewrite the rules of classical physics," Scully said.

From Science Daily ● Jul. 5, 2026

For more than 300 years, Newton's third law has been one of the foundations of classical physics.

From Science Daily ● Jun. 16, 2026

The findings highlight how Einstein's theory continues to shape our understanding of the universe, even in systems once thought to be well explained by classical physics.

From Science Daily ● Apr. 19, 2026

Of particular interest for researchers in the field are the peculiar and bizarre properties of quantum particles -- which deviate completely from the laws of classical physics and can make materials magnetic or superconducting.

From Science Daily ● Apr. 10, 2024

Unfortunately for Einstein, the laws of quantum mechanics work incredibly well, and you can’t successfully explain quantum effects with traditional classical physics.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife