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theories

  • plural
    of theory.
    theory
    noun
    a coherent group of tested general propositions, commonly regarded as correct, that can be used as principles of explanation and prediction for a class of phenomena.

Example Sentences

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Shovel in the fact that some conspiracy theories have turned out to be at least semi-plausible—cue the drip-drip of UFO disclosures—and you have fertile soil for sprawling kudzu-like growth in the business of manufactured truth.

From The Wall Street Journal ● Aug. 13, 2026

Cox’s Gregory has theories about the second-quarter pop in auto financing: It could be attributed, at least partly, to more electric-vehicle and hybrid sales as gas prices increased, he said.

From MarketWatch ● Aug. 13, 2026

There were a few theories how it got there.

From BBC ● Aug. 11, 2026

Many physicists see this breakdown as evidence that existing theories do not provide a complete description of the Universe at its earliest stage.

From Science Daily ● Aug. 11, 2026

If Ibn al-Haytham offered plenty of real experiments, medieval philosophy is also full of thought experiments designed to test the implications of theories.

From "The Invention of Science" by David Wootton