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.
theories
-
pluralof theory.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mr. Buck analyzed more than 400 readings from 75 course syllabi and categorized them as “traditional,” “progressive,” “therapeutic,” or “critical,” meaning critical race and other social justice theories.
From The Wall Street Journal ● Sep. 8, 2026
“There’s different approaches and theories, but I do have a lot of trust in our group and we’ll see. Hopefully, it works out.”
From Los Angeles Times ● Sep. 4, 2026
In Christianity, the "end times" phrase refers to theories about what will happen at the end of the world.
From BBC ● Sep. 3, 2026
Two remarkably successful theories explain nearly everything we observe in the universe, from tiny atoms and molecules to planets, stars, and galaxies.
From Science Daily ● Aug. 30, 2026
I was struck over and over by similarities between their times and ours, including: countrywide divisions, political name-calling, competing media outlets, new technologies, conspiracy theories, an addiction crisis, a pandemic, and the emphasis on fame.
From "American Spirits" by Barb Rosenstock
