quantum mechanics

noun

plural in form but singular or plural in construction
: a theory of matter that is based on the concept of the possession of wave properties by elementary particles, that affords a mathematical interpretation of the structure and interactions of matter on the basis of these properties, and that incorporates within it quantum theory and the uncertainty principle

called also wave mechanics

quantum mechanical adjective
quantum mechanically adverb

Examples of quantum mechanics in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Personalized learning systems can tailor complex scientific concepts to individual learners, making the vastness of quantum mechanics or the intricacies of protein folding more accessible and, consequently, more awe-inspiring. Cornelia C. Walther, Forbes.com, 1 June 2025 According to quantum mechanics, an object or observer can be in multiple locations at once. Shalma Wegsman, Wired News, 25 May 2025 The idea is to use principles of quantum mechanics to surpass the resolution limits of current telescopes, allowing scientists to image objects smaller or closer together than what traditional optics would permit. Victoria Corless, Space.com, 22 May 2025 But Steve was working on this effort to reconcile quantum mechanics and gravity. Steven Strogatz, Quanta Magazine, 17 Apr. 2025 See All Example Sentences for quantum mechanics

Word History

First Known Use

1922, in the meaning defined above

Time Traveler
The first known use of quantum mechanics was in 1922

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Cite this Entry

“Quantum mechanics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantum%20mechanics. Accessed 4 Jun. 2025.

Medical Definition

quantum mechanics

noun, plural in form but singular or plural in construction
: a theory of matter that is based on the concept of the possession of wave properties by elementary particles, that affords a mathematical interpretation of the structure and interactions of matter on the basis of these properties, and that incorporates within it quantum theory and the uncertainty principle

called also wave mechanics

quantum mechanical adjective
quantum mechanically adverb

More from Merriam-Webster on quantum mechanics

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