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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

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

After a period of tension due to Alex challenging Melanie's theories, she did not allow him to live in her caravan and he was forced to spend six months sleeping in a tent.

From BBC • May 13, 2026

Exactly the same relativist approach is employed with regard to facts as to theories; indeed, the two are often indistinguishable.

From "The Invention of Science" by David Wootton