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

transitive verb

: to form a theory about
: 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 The captain of the Morrell, the historians said, theorized that the smaller ship may struck the ice. Frank Witsil, Detroit Free Press, 1 May 2024 Hawass theorized that Nefertiti returned to Thebes based on some feminine evidence of a female pharaoh found in Tutankhamun's tomb. Paul Smaglik, Discover Magazine, 1 May 2024 See all Example Sentences for theorize 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'theorize.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1638, in the meaning defined at intransitive sense

Time Traveler
The first known use of theorize was in 1638

Dictionary Entries Near theorize

Cite this Entry

“Theorize.” Dictionary, Merriam-Webster, Accessed 19 May. 2024.

Kids Definition


the·​o·​rize ˈthē-ə-ˌrīz How to pronounce theorize (audio)
theorized; theorizing
: to form a theory : speculate
theorizer noun
Last Updated: - Updated example sentences
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