Definition of deduce in US English:



[with object]
  • 1Arrive at (a fact or a conclusion) by reasoning; draw as a logical conclusion.

    ‘little can be safely deduced from these figures’
    with clause ‘they deduced that the fish died because of water pollution’
    • ‘Much can be deduced from his art, but the facts surrounding his life remain obscure to an English-speaking audience.’
    • ‘It can also be deduced from a copy of the second treatise of Serenus which has survived.’
    • ‘The conclusions he deduced from it depended entirely on his empirical assumptions.’
    • ‘Although the reason is unclear I think that, as my neighbour called for my post, it was deduced that I no longer required my box.’
    • ‘Scientists have deduced that the known physical universe has existed for approx 12 billion years since the Big Bang.’
    • ‘It's not possible to deduce moral conclusions from first principles.’
    • ‘As conscious beings we can deduce that the logical conclusion of this decline is our extinction.’
    • ‘Less obvious truths are deduced from these self-evident beginnings by individually obvious steps.’
    • ‘We have very little information about Bhaskara I's life except what can be deduced from his writings.’
    • ‘Hempel and Oppenheim made the important logical point that statements about a phenomenon cannot be deduced from general laws alone.’
    • ‘Joseph Raphson's life can only be deduced from a number of pointers.’
    • ‘Nothing further is to be deduced from this reference.’
    • ‘And with a great leap of logical brilliance, he deduced that he was looking at a ceiling.’
    • ‘Examples include Charles Darwin deducing the fact of evolution and then formulating a powerful theory to explain it, thus laying the very foundation of our modern understanding of life.’
    • ‘Some dates and places from this period can again be deduced from descriptions of astronomical events recorded by al-Biruni.’
    • ‘The Academics took the part of the questioner, who puts questions to his interlocutors and deduces conclusions that are unwelcome to them from their answers.’
    • ‘He deduces this curious conclusion from their view that a site would have no economic value were it not for the community around it, assuming that this implies that the community is the sole producer.’
    • ‘Newton had deduced from his theory of gravitation that the Earth would be flattened at the poles.’
    • ‘The comet made no reappearance and again Lexell correctly deduced that Jupiter had changed the orbit so much that it was thrown far away from the Sun.’
    • ‘From this it was deduced that Diophantus wrote around 250 AD and the dates we have given for him are based on this argument.’
    conclude, come to the conclusion, reason, work out, gather, infer, draw the inference
    View synonyms
    1. 1.1archaic Trace the course or derivation of.
      ‘he cannot deduce his descent wholly by heirs male’


Late Middle English (in the sense ‘lead or convey’): from Latin deducere, from de- ‘down’ + ducere ‘lead’.