set theory
noun
: a branch of mathematics or of symbolic logic that deals with the nature and relations of sets
set theoretic
adjective
Examples of set theory in a Sentence
Recent Examples on the Web
But the math of set theory, which so often dwells in a world beyond proof, tends to look more like physics or biology, as Aguilera put it.
—
Gregory Barber, Quanta Magazine, 20 June 2025
But the viewer doesn’t need to know a thing about set theory to find her organization of lines and angles beautiful.
—Grace Edquist, Vogue, 25 Nov. 2024
An Alternative Mathematics Some experts were therefore determined to reject the axiom of choice and instead work only with the eight fundamental truths of Zermelo-Fraenkel set theory.
—Manon Bischoff, Scientific American, 1 Oct. 2024
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.
Gregory Barber, Quanta Magazine, 20 June 2025
But the viewer doesn’t need to know a thing about set theory to find her organization of lines and angles beautiful.
—Grace Edquist, Vogue, 25 Nov. 2024
An Alternative Mathematics Some experts were therefore determined to reject the axiom of choice and instead work only with the eight fundamental truths of Zermelo-Fraenkel set theory.
—Manon Bischoff, Scientific American, 1 Oct. 2024
Cite this Entry
“Set theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/set%20theory. Accessed 16 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share