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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.

He called upon the assembly “to affirm and reestablish those old theories and principles which time and the unerring logic of events have demonstrated to be sound.”

From The Wall Street Journal • May 22, 2026

The judge found prosecutors’ arguments were legal theories, not solid law, dismissing eight counts with prejudice.

From The Wall Street Journal • May 21, 2026

"Historically, our planet formation theories are based on what we see and know about our Solar System," Isabel Rebollido who is currently a Research Fellow at ESA points out.

From Science Daily • May 21, 2026

That includes “how agencies allocate resources, the types of cases emphasized, how aggressively certain theories are pursued, and how the government frames its enforcement mission publicly.”

From MarketWatch • May 20, 2026

They are new additions to secure knowledge; they are, in our terms, theories.

From "The Invention of Science" by David Wootton