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.
This one did something else, reaching extreme heights but never achieving the sustained success of more entrenched conspiracy theories.
From Slate ● Oct. 16, 2026
Economists have often found that theories cannot substitute for evidence.
From The Wall Street Journal ● Oct. 13, 2026
The Oxford project began in 2022, when lead author Dr. Sebastian Saner, Dr. Oana Bazavan, and their colleagues started developing a way to simulate lattice gauge theories using a hybrid quantum system.
From Science Daily ● Oct. 13, 2026
In the cars on the way back, the players continued to debate various theories, with a particularly awkward journey where Myha'la and Hesmondhalgh admitted they were suspicious of each other.
From BBC ● Oct. 8, 2026
Unlike the larger earthquakes, where scientists had a single, generally accepted theory about what was happening far below the surface, there were several theories about what caused harmonic tremors.
From "Mountain of Fire" by Rebecca E. F. Barone
