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.
Researchers theorize that residents abandoned the city before the quake, with nomadic tribes possibly taking over the ruins afterward. Maria Mocerino, Interesting Engineering, 15 Nov. 2025 Eventually, the Pirates of the Caribbean director theorized, AI would run into learning limitations, with large language models having to be trained on previous iterations of AI outputs and consequently regurgitating a worse product. Natalie Oganesyan, Deadline, 15 Nov. 2025 Astronomers have discovered that the solar system may be moving through the cosmos over three times faster than was previously theorized. Robert Lea, Space.com, 14 Nov. 2025 Her mother-in-law, Lucinda Witte, theorized that Erika clung to Drew so much because family was especially precious to her. Ariane Lange, Sacbee.com, 13 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

Browse Nearby Words

Cite this Entry

“Theorize.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/theorize. Accessed 18 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!