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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.

Felix Salmon, Elizabeth Spiers, and Emily Peck, discuss theories on why the hell anyone would do this and whether it’s just weird or actually sinister.

From Slate • May 23, 2026

Judge Rebecca Robinson granted a motion to dismiss made by Parker’s defense attorney, finding that the arguments made by prosecutors were legal theories, not a solid law on which to charge someone with a crime.

From The Wall Street Journal • May 21, 2026

According to leading theories of planet formation, rocky planets form near their star while gas giants develop farther away where cooler conditions allow thick atmospheres to build up.

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

I can find only two people who, after the publication of Waldseemüller’s map, sought to defend the old theory against its attackers: the new reality was incompatible with the old theories.

From "The Invention of Science" by David Wootton