To theorize is to come up with a theory about something. You might theorize about the cause of a problem, or the best way to solve it.

  • He theorizes about the best way to solve the problem.

  • The scientist theorizes about the cause of the problem.

Definition of theorize


to believe especially on uncertain or tentative grounds


conjecture, hypothecate, hypothesise, hypothesize, speculate, suppose, theorise


construct a theory about


form or construct theories

Nearby Words

theorize Pronunciation in a video (2)

Example Sentences for theorize

  • 1

    He theorized a circulation of the blood.

  • 2

    No salutary purpose is served by further theorizing and indecision.

  • 3

    Observers theorize that Americans are spending a lot of money.

  • 4

    It is theorized that the city was submerged at the end of the last ice age.

  • 5

    Let the philosophers theorize about the subliminal hierarchael message.

  • 6

    Or are you the first person to theorize that Greeks influenced the Chinese

  • 7

    It is theorized to have a mass 500 trillion times the mass of the Sun.

  • 8

    He was the first to theorize infinite suns and infinite worlds in the universe.

  • 9

    Experts theorize that heavy news coverage of such attacks increases the notoriety of the attackers.

  • 10

    I want to theorize on whether or not she has a genuinely decent relationship with her husband.