Definition of "conjecture"

conjecture

/kənˈd͡ʒɛk.t͡ʃə(ɹ)/

noun
countable and uncountable, plural conjectures
1. (formal) A statement or an idea which is unproven, but is thought to be true; a guess.
2. (formal) A supposition based upon incomplete evidence; a hypothesis.
3. (mathematics, linguistics) A statement likely to be true based on available evidence, but which has not been formally proven.
4. (obsolete) Interpretation of signs and omens.
verb
third-person singular simple present conjectures, present participle conjecturing, simple past and past participle conjectured
1. (formal, intransitive) To guess; to venture an unproven idea.
2. (transitive) To infer on slight evidence; to guess at.
  Quotations
  "Most likely he who is the shorter of the two;—no! he goes in the first, and is, of course, the eldest; but we have no time for conjecturing now."Human reason can then, at the best, but conjecture what will be.
  1838 (date written), L[etitia] E[lizabeth] L[andon], chapter XIX, in Lady Anne Granard; or, Keeping up Appearances. […], volume I, London: Henry Colburn, […], published 1842, page 243