theorem

noun

the·​o·​rem ˈthē-ə-rəm How to pronounce theorem (audio)
ˈthir-əm
1
: a formula, proposition, or statement in mathematics or logic deduced or to be deduced from other formulas or propositions
2
: an idea accepted or proposed as a demonstrable truth often as a part of a general theory : proposition
the theorem that the best defense is offense
3
4
: a painting produced especially on velvet by the use of stencils for each color
theorematic adjective

Examples of theorem 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.
Turing’s proof of the theorem is scrawled over two sheets. IEEE Spectrum, 4 Feb. 2025 So somebody might try to construct a mathematical theorem and then hundreds or even thousands of years later, somebody else finishes it off. Lynette Rice, Deadline, 5 Mar. 2025 Pythagoras' theorem is famously brief and everybody can understand it. Jake Kring-Schreifels, TIME, 5 Mar. 2025 Delilah was in effect an application of a bandwidth theorem that today is known as the Nyquist-Shannon sampling theorem. IEEE Spectrum, 4 Feb. 2025 See All Example Sentences for theorem

Word History

Etymology

Late Latin theorema, from Greek theōrēma, from theōrein to look at, from theōros spectator, from thea act of seeing — more at theater entry 1

First Known Use

1551, in the meaning defined at sense 1

Time Traveler
The first known use of theorem was in 1551

Cite this Entry

“Theorem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/theorem. Accessed 22 Mar. 2025.

Kids Definition

theorem

noun
the·​o·​rem ˈthē-ə-rəm How to pronounce theorem (audio)
ˈthi(-ə)r-əm
1
: a formula, proposition, or statement in mathematics or logic that has been or is to be proved from other formulas or propositions
2
: an idea accepted or proposed as a demonstrable truth

More from Merriam-Webster on theorem

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