noun

1. A statement or an idea which is unproven, but is thought to be true; a guess.

   “I explained it, but it is pure conjecture whether he understood, or not.”

2. A supposition based upon incomplete evidence; a hypothesis.

   “The physicist used his conjecture about subatomic particles to design an experiment.”

3. (philology) A statement likely to be true based on available evidence, but which has not been formally proven.

Synonyms: halseny

verb

1. To guess; to venture an unproven idea.

   “I do not know if it is true; I am simply conjecturing here.”

2. To infer on slight evidence; to guess at.