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

In particular, revolutions like special relativity and general relativity, quantum mechanics and quantum field theory, and the Big Bang and cosmic inflation completely overthrew our prior picture of how things actually behave. —Ethan Siegel, Big Think, 5 Sep. 2025

Yet the disappearance of all other information about the engulfed object conflicts with one of the central tenets of quantum mechanics. —Matt Von Hippel, Quanta Magazine, 27 Aug. 2025

What’s Actually At Risk Quantum computers use the principles of quantum mechanics to solve problems far beyond the reach of classical machines. —Maeson Maherry, Forbes.com, 22 Aug. 2025

The quantum dot, essentially a semiconductor particle, is so small that its behavior can only be explained through quantum mechanics. —Georgina Jedikovska, Interesting Engineering, 19 Aug. 2025

Word History

First Known Use

1922, in the meaning defined above

Rhymes for quantum mechanics

• biomechanics
• hispanics
• organics
• volcanics
• panics

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