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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.

Some theories suggested birds could detect magnetic fields through light-sensitive molecules in their eyes.

From Science Daily • May 31, 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

There are a wide range of potential new theories that can explain our findings.

From Science Daily • May 26, 2026

A third study suggests debunkbots’ success at challenging conspiracy theories is driven by their ability to clearly explain relevant facts.

From The Wall Street Journal • May 24, 2026

As they walked across the school yard, Frank and Joe heard all different kinds of theories.

From "Hopping Mad (The Hardy Boys: Secret Files, #4)" by Franklin W. Dixon