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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.

Fundamentally most conspiracy theories are highly implausible and just don’t make sense.

From The Wall Street Journal • May 24, 2026

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

Under standard theories, planets form within giant discs of gas and dust called protoplanetary discs.

From Science Daily • May 21, 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

“An extraordinary number of absurd theories are advanced.”

From "The Mona Lisa Vanishes" by Nicholas Day