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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.

The scientists suggested several theories for why these two humpbacks embarked on such "exceptional" deviations from the normal routes.

From Barron's • May 20, 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

This helped researchers rule out competing theories, including the idea that the material came from older supernova explosions that slowly faded over millions of years.

From Science Daily • May 14, 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

We live in a conspiratorial age, and the conspiracy theories about the Mona Lisa theft reflect our own time.

From "The Mona Lisa Vanishes" by Nicholas Day