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theories

NOUN

hypothesis, belief

Synonyms

STRONGEST

approach argument assumption code concept doctrine idea ideology method philosophy plan position premise proposal provision rationale scheme speculation suspicion system thesis understanding

STRONG

base basis codification conditions conjecture dogma feeling foundation grounds guess guesswork hunch impression outlook postulate presentiment presumption shot stab supposal supposition surmise theorem

WEAK

formularization suppose systemization

Antonyms

STRONGEST

disbelief fact information reality truth

STRONG

calculation knowledge measurement proof

WEAK

certainty

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.

Using Bayesian modeling that considered how species are evolutionarily related, the researchers tested several major theories about the origins of handedness.

From Science Daily • May 18, 2026

There he began developing the theories that would direct his life and work—the idea, for instance, that a “talented tenth” would lead black America to liberation.

From The Wall Street Journal • May 14, 2026

But that has not stopped conspiracy theories and disinformation about vaccines and hantavirus spreading widely online -- another echo of the Covid era.

From Barron's • May 13, 2026

His mother, Melanie, who was not his legal guardian and was heavily influenced by conspiracy theories, told him to throw away his passport.

From BBC • May 13, 2026

Einstein hadn’t been afraid to share his theories, and he’d definitely believed in them.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas