From Old French, from Latin coniectūra (“a guess”), from coniectus, perfect passive participle of cōniciō (“throw or cast together; guess”), from con- (“together”) + iaciō (“throw, hurl”); see jet. Compare adjective, eject, inject, project, reject, subject, object, trajectory.
conjecture (countable and uncountable, plural conjectures)
- (formal) A statement or an idea which is unproven, but is thought to be true; a guess.
- (formal) A supposition based upon incomplete evidence; a hypothesis.
- (mathematics, philology) A statement likely to be true based on available evidence, but which has not been formally proven.
- (obsolete) Interpretation of signs and omens.
conjecture (third-person singular simple present conjectures, present participle conjecturing, simple past and past participle conjectured)
- (formal, intransitive) To guess; to venture an unproven idea.
- (transitive) To infer on slight evidence; to guess at.