Meaning & use
conjecture
An opinion or conclusion formed on the basis of incomplete information, without solid proof.
See it in a sentence
Without any hard evidence, the theory remains pure conjecture among historians.
It's mere conjecture to say the company will fail; nothing has been confirmed yet.
A note on using this word
Conjecture is more formal than 'guess' and is commonly used in academic, legal, or scientific writing to flag an unproven claim.
Words with a similar meaning
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