theorize

verb

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

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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With masses equivalent to millions or even billions of suns, supermassive black holes are too massive to have been born from dying stars; instead, it is theorized that they are created when smaller black holes collide and merge, and a chain of progressively larger and larger mergers. Robert Lea, Space.com, 12 Sep. 2025 Adell returned to action on Wednesday, but Montgomery theorized that the flight to Seattle on Wednesday evening set him back. Jeff Fletcher, Oc Register, 12 Sep. 2025 Much of the conspiracy theorizing over Balaji’s death has to do with the refusal of his parents to accept the official findings and insistence that he was murdered. Preston Fore, Fortune, 11 Sep. 2025 The romantic melody has been widely theorized to reference now-fiancé Kelce. Sabrina Weiss, PEOPLE, 11 Sep. 2025 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 15 Sep. 2025.

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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