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
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.
The director playfully joked not to ask him what Camazotz is, as many views and fans have started theorizing how that name could tie into the show. Dessi Gomez, Deadline, 7 Nov. 2025 The team behind this research thinks that this clear concentration of heat, rather than a global emission, could suggest that an Io-wide lava lake may not exist beneath the surface of this moon of Jupiter as has previously been theorized. Robert Lea, Space.com, 7 Nov. 2025 Quasicrystals were first theorized in the 1980s and later observed experimentally, a discovery that earned Dan Schechtman the 2011 Nobel Prize in Chemistry. Neetika Walter, Interesting Engineering, 6 Nov. 2025 Now, figures in both parties theorize that Tuesday might be a tipping point, and that lawmakers will be more willing to find an off-ramp after elections in Virginia, California, New York, New Jersey and elsewhere. Mike Lillis, The Hill, 5 Nov. 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 12 Nov. 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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