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classical mechanics

noun

plural in form but singular or plural in construction
physics
: a theory of matter that is based on Newtonian (see newtonian sense 2) mechanics and describes the behavior of particles in the absence of quantum effects compare quantum mechanics

Examples of classical mechanics in a Sentence

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Quantum mechanics replaced classical mechanics, and then quantum field theory went still further. Big Think, 12 Nov. 2025 See All Example Sentences for classical mechanics

Word History

First Known Use

1901, in the meaning defined above

Time Traveler
The first known use of classical mechanics was in 1901

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Cite this Entry

“Classical mechanics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/classical%20mechanics. Accessed 1 Dec. 2025.

Last Updated: - Updated example sentences
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