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 answer is the Rare Earth hypothesis, which theorizes that our planet really is special. Emma Gometz, Scientific American, 12 June 2026 Gavin theorizes that maybe everything is a little too nice, a little too boring, and Kenny wants some more passion in his relationship. Brian Moylan, Vulture, 10 June 2026 These researchers theorize that black holes can also form at much more diminutive sizes that do not require the existence and death of massive stars or prior pairs of black holes. Robert Lea, Space.com, 10 June 2026 As of now, Swifties theorize that the singer’s childhood best friend, Abigail Anderson Berard, will be the maid—actually matron—of honor. Allison Degrushe, StyleCaster, 10 June 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 14 Jun. 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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