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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.

Both his loyal supporters and well-financed critics have a hard time explaining Becerra’s rapid ascent, with theories ranging from outright luck to a nefarious social media push.

From Los Angeles Times • Jun. 1, 2026

“The new indictment confirms that our motion to dismiss was a good one — it’s just new charges and new theories trotted out in the hope that something sticks,” Trusty said.

From Los Angeles Times • May 29, 2026

Earlier measurements suggested WASP-94A b contained hundreds of times more oxygen and carbon than Jupiter, something that did not fit with existing theories of planet formation.

From Science Daily • May 27, 2026

The National Institutes of Health notes that “evolutionary theories of aging predict a trade-off between fertility and lifespan, where increased lifespan comes at the cost of reduced fertility.”

From The Wall Street Journal • May 27, 2026

Einstein’s theories corrected Newton’s errors; they explained Mercury’s wobble, for instance.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife