Definition of conjecture in English:

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Pronunciation: /kənˈdʒɛktʃə/


1An opinion or conclusion formed on the basis of incomplete information: conjectures about the newcomer were many and varied [mass noun]: a matter for conjecture
More example sentences
  • At the same time, I willingly sign up to support longer-range conjectures about the place and purpose of social tools, in general, and explicit software networking technologies, in specific.
  • For the rest of the morning she issued conjectures about the change in her social status this swingset would bring about.
  • So we sat, the last few hours, thinking about the last few months and making conjectures about the future.
guess, speculation, surmise, fancy, notion, belief, suspicion, presumption, assumption, theory, hypothesis, postulation, supposition;
inference, extrapolation, projection;
approximation, estimate, rough calculation, rough idea;
guesswork, guessing, surmising, imagining, theorizing
informal guesstimate, shot in the dark
North American informal ballpark figure
1.1An unproven mathematical or scientific theorem.
Example sentences
  • Scientific theories are conjectures based upon interpretations of the data, and therefore are never ‘proven’, but merely supported or not by such interpretations.
  • He proposed a demarcation criterion that, in his view, made the distinction between scientific theories and non-scientific conjectures.
  • Everyone knows it holds true for every number you can think of but provide rigorous mathematical proof and you win yourself a million bucks - courtesy of the book's publisher, and in the process turn a conjecture into a theorem.
1.2 [mass noun] (In textual criticism) the suggestion of a reading of a text not present in the original source.
Example sentences
  • He was as sparing with critical opinions as he was with textual conjecture - only about ten percent of his notes might be called judicial.
  • He is aware of the present trend away from textual conjecture.


[reporting verb]
1Form an opinion or supposition about (something) on the basis of incomplete information: [with clause]: many conjectured that she had a second husband in mind
More example sentences
  • Therefore, this hypothesis conjectures that population density should be positively correlated with patch area.
  • It was conjectured that a spiral walkway would have led around the hill allowing a procession to reach the 120-foot high summit for pre-historic ceremonies.
  • It is conjectured that natural selection tuned the average connectivity in such a way that the network reaches a sparse graph of connections.
guess, speculate, surmise, infer, fancy, imagine, believe, think, suspect, presume, assume, hypothesize, take as a hypothesis, theorize, form/formulate a theory, suppose
1.1(In textual criticism) propose (a reading).
Example sentences
  • As he conjectures that the story is not about the mutually longed-for tryst that he had read into her letters, he questions his own ability to interpret what is figured in a text.
  • There are several cases, however, where I have had to conjecture a reading of the text in order to make sense of it.



Pronunciation: /kənˈdʒɛktʃərəb(ə)l/
Example sentences
  • It is conjecturable that the temperature in these regions will increase up to 4°C.
  • It is a mix of threes & fours, at which I arrived when I wondered what other conjecturable particles besides tachyons may be conceived through the exploration of special-relativistic equations.
  • It is always the similar which is capable of knowing the similar; reason knows the intelligible things; science, the knowable things; opinion, conjecturable things; sensation, sensible things.


Late Middle English (in the senses 'to divine' and 'divination'): from Old French, or from Latin conjectura, from conicere 'put together in thought', from con- 'together' + jacere 'throw'.

  • jet from late 16th century:

    The name jet for a hard black semi-precious mineral comes ultimately from the Greek word gagatēs ‘from Gagai’, a town in Asia Minor. When we refer to a jet of water or gas, or a jet aircraft, we are using a quite different word. It comes from a late 16th-century verb meaning ‘to jut out’, from French jeter ‘to throw’, which goes back to the Latin jacere ‘to throw’. Jut (mid 16th century) is a variant of jet in this sense. Jacere is found in a large number of English words including abject (Late Middle English) literally ‘thrown away’; conjecture (Late Middle English) ‘throw together’; deject (Late Middle English) ‘thrown down’; ejaculate (late 16th century) from jaculum ‘dart, something thrown’; eject (Late Middle English) ‘throw out’; inject (late 16th century) ‘throw in’; jetty (Late Middle English) something thrown out into the water; project (Late Middle English) ‘throw forth’; subject (Middle English) ‘thrown under’; trajectory (late 17th century) ‘something thrown across’. Especially if you use budget airlines, air travel today is far from glamorous, but in the 1950s the idea of flying abroad by jet aircraft was new and sophisticated. At the start of that decade people who flew for pleasure came to be known as the jet set.

Words that rhyme with conjecture


For editors and proofreaders

Line breaks: con|jec¦ture

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