string theory

noun

: a theory in physics: all elementary particles are manifestations of the vibrations of one-dimensional strings

Examples of string theory in a Sentence

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There are hints for a discreteness in some approaches to quantum gravity, for example string theory or loop quantum gravity, but the situation is far from clear. Quanta Magazine, 18 May 2026 And string theory was the leading candidate for uniting physics’ two brilliant but mutually incompatible frameworks, relativity and quantum mechanics, although just 19% backed it. Tom Chivers, semafor.com, 13 May 2026 Unlike asymptotic freedom, however, heterotic string theory (and string theory in general) has yet to be validated by experiments. Lee Billings, Scientific American, 28 Apr. 2026 The Special Breakthrough Prize in Fundamental Physics goes to David J. Gross for a career of foundational contributions, including explaining how the strong nuclear force behaves at different energy scales and advancing string theory — key steps toward a unified description of nature. Samantha Mathewson, Space.com, 26 Apr. 2026 See All Example Sentences for string theory

Word History

First Known Use

1973, in the meaning defined above

Time Traveler
The first known use of string theory was in 1973

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Cite this Entry

“String theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/string%20theory. Accessed 21 May. 2026.

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