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

Definition of theorize

transitive verb

1 : to form a theory about
2 : to propose as a theory

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Other Words from theorize

theorization \ ˌthē-​ə-​rə-​ˈzā-​shən How to pronounce theorization (audio) , ˌthir-​ə-​ \ 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 Williams theorizes that Maria had asked Rocco to take Mutley — for the kids' sake, and that Mutley had run off accidentally when Rocco stopped along the way. Peter Van Sant, CBS News, "Murder victim's friends say PA woman made good on her vow to kill," 16 Nov. 2019 The cocktail is popular for two reasons, Lyons theorizes. Tirion Morris, azcentral, "Tiki culture's not dead. This underground Phoenix bar's zombie cocktail is proof," 24 Oct. 2019 A few years back, a couple of academic researchers theorized that playing violent video games can make people less trusting, more paranoid., "With new video game system Stadia, Google is playing us again - The Boston Globe," 18 Nov. 2019 Rogers theorized that smuggled tree clippings from Asia brought it to the Delray Beach area in 2005. Darryl Fears,, "The end of Florida orange juice? A lethal disease is devastating the state’s citrus industry," 11 Nov. 2019 Fans had theorized the silhouettes represent new songs. Alaa Elassar, CNN, "Frank Ocean releases surprise single 'In My Room'," 2 Nov. 2019 When a Post reporter visited the rink this week, one employee theorized that the decision was made because the Trump branding was driving some customers away. Philip Bump, Anchorage Daily News, "Just in time for skating season, Trump’s company largely scrubs his name from NYC ice rinks," 23 Oct. 2019 One of the surviving crew members has theorized that a phone charging station may have caused the fire. Los Angeles Times, "Some Conception passengers said they weren’t told about emergency escape hatch," 12 Sep. 2019 Now, the internet is theorizing about what Luke's expression meant. Kayla Keegan, Good Housekeeping, "'American Idol' Judge Luke Bryan's Reaction to Carrie Underwood's Finale Performance Is Everything," 20 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'theorize.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of theorize

1638, in the meaning defined at intransitive sense

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Time Traveler for theorize

Time Traveler

The first known use of theorize was in 1638

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Statistics for theorize

Last Updated

12 Dec 2019

Cite this Entry

“Theorize.” The Dictionary, Merriam-Webster Inc., Accessed 14 December 2019.

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More Definitions for theorize


How to pronounce theorize (audio)

English Language Learners Definition of theorize

: to think of or suggest ideas about what is possibly true or real : to form or suggest a theory about something

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