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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

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

"Models for the composition of temperate, gas-giant exoplanets had predicted that they would contain methane, so it is good to get confirmation that our theories are accurate."

From Science Daily • May 22, 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

“And I’d love to continue our conversation about Einstein’s theories, like how black holes make orbiting matter wobble.”

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