Definition of conjectural in English:



  • Based on or involving conjecture.

    ‘the evidence was deemed too conjectural’
    • ‘My point is why make the claim for a developed canon in the first place, especially when it is based on conjectural attributions and dates.’
    • ‘It is their reliance on conjectural statements based on outward similarities that mars the book as a whole.’
    • ‘Despite increased understanding of the nature of the disease in general, the factors that contribute to symptomatic destabilization are little studied and much remains conjectural.’
    • ‘Watson and Crick were determined to try to build a conjectural model of the structure of DNA.’
    • ‘Certainly, where the evidence in question is equivocal, in the sense of ambiguous and uncertain and conjectural in nature, the probative force is of such diminished significance as to be valueless.’
    • ‘Although this sort of analogy to herd-living, open-country ungulates will always be somewhat conjectural, it is far from being completely speculative.’
    • ‘The defendant says the elements of the loss must be established with reasonable certainty, and must not be speculative or conjectural.’
    • ‘A conjectural science, which teaches to judge of the effects and influences of the stars, and to foretell future events by the situation and different aspects of the heavenly bodies.’
    • ‘Fears of conjectural health risk from the pesticides themselves, as well as environmental concerns, would have swamped the valid arguments for the employment of such techniques.’
    • ‘Address your fears with conjectural theory and speculation.’
    • ‘Prying apart the text, he located discrepancies between the author's conjectural inferences and the evidence actually offered in support of those inferences.’
    • ‘Gone are the days when scientists could look at the state as a bottomless pit of resources for often conjectural studies.’
    • ‘Yet, it does not explain why its proponents don't believe in unicorns, leprechauns or other such conjectural entities, all of which also lie outside the imagined boundaries of science.’
    • ‘Her inspiring words were the only remnants other than my conjectural thoughts that I allowed to follow my every flight.’
    • ‘Citing the findings of previous interpreters could also be a way of letting readers know that a translation was itself a conjectural reconstruction open to refutation.’
    • ‘The vignettes that follow are conjectural, but they may suggest ways in which his life as we know it found its way into his art.’
    • ‘Altered estrogen receptor sensitivity is another possible abnormality, but like the estrogen-androgen imbalance suggestion, it is completely conjectural.’
    • ‘It is preoccupied with hypothetical origins and conjectural future ends.’
    • ‘Everything else - that is, the actual character of the external world and of our relationship to it - must remain conjectural or hypothetical, though some hypotheses are better than others.’
    • ‘The foregoing is conjectural, and is intended more to suggest an approach to establishing action on behalf of the future than to prescribe specifics.’
    speculative, suppositional, theoretical, hypothetical, putative, academic, notional, abstract
    View synonyms


Mid 16th century: via French from Latin conjecturalis, from conjectura ‘inference’ (see conjecture).