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
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.
Not speaking from experience, just theorizing. Savannah Salazar, Vulture, 30 Jan. 2026 Dyson theorized that the most advanced alien civilizations would have the capacity to harvest the energy from their local star on a massive scale. Chris Young, Interesting Engineering, 28 Jan. 2026 For viewers who love theorizing, debating strategies, and watching together, the watch party has become a regular gathering spot. Holly Alvarado, Oc Register, 28 Jan. 2026 Some people still call him that, and theorize that the injuries likely have something to do with the style of the team’s play or its approach to strength and conditioning or stretching and recovery. Kaitlyn Tiffany, The Atlantic, 23 Jan. 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 1 Feb. 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

More from Merriam-Webster on theorize

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