theorize

verb

the·​o·​rize ˈthē-ə-ˌrīz How to pronounce theorize (audio)
ˈthir-ˌīz
theorized; theorizing
Synonyms of theorizenext

transitive verb

1
: to form a theory about
2
: to propose as a theory
theorization noun
theorizer noun

Examples of theorize in a Sentence

Many scientists have theorized about the possibility of life on other planets.
Recent Examples on the Web
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One useful outcome of this research and its findings is the fact that millisecond pulsars should be easier to detect than astronomers had previously theorized. Robert Lea, Space.com, 3 Apr. 2026 The earliest Greek philosophers focused their attention upon the origin and nature of the physical world; later philosophers have theorized about the nature of knowledge, truth, good and evil, love, friendship, and much more. Encyclopedia Britannica, 2 Apr. 2026 The Kreutz group is named for Heinrich Kreutz, a German astronomer who determined that several notable nineteenth-century comets traveled in similar orbits and were fragments of a large comet that broke apart (perhaps around the time of the last ice age, it has since been theorized). Tony Hoffman, PC Magazine, 2 Apr. 2026 The fourth dimension, which originated in the eighteenth century and was mathematically theorized in the nineteenth, both described diagrammable space and functioned as an expression of time. Katherine Rochester, Artforum, 1 Apr. 2026 See All Example Sentences for theorize

Word History

First Known Use

1644, in the meaning defined at transitive sense 1

Time Traveler
The first known use of theorize was in 1644

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Cite this Entry

“Theorize.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/theorize. Accessed 4 Apr. 2026.

Kids Definition

theorize

verb
the·​o·​rize ˈthē-ə-ˌrīz How to pronounce theorize (audio)
theorized; theorizing
: to form a theory : speculate
theorizer noun

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