plural conjectures
formal
: an opinion or idea formed without proof or sufficient evidence : guess
The biography includes conjectures about the writer's earliest ambitions.
a conjecture about the extent of the injury
Your plan is based on (nothing more than) conjecture.
Most of the book is conjecture, not fact.
The criminal's motive remains a matter of conjecture. [=people can only guess about the criminal's motive; no one knows the criminal's motive]
conjectures; conjectured; conjecturing
formal
: to form an opinion or idea without proof or sufficient evidence
Some have conjectured that the distant planet could sustain life.
We only conjecture about his motives.
Cite this Entry
“Conjecture.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/conjecture. Accessed 14 Jul. 2026.
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