• (British) IPA: /dɪˈdjuːs/, IPA: /dɪˈdʒuːs/
• (America) IPA: /dɪˈduːs/

deduce (deduces, present participle deducing; past and past participle deduced)

1. (transitive) To reach a conclusion by applying rules of logic to given premises.
   • 1703, Alexander Pope, Thebais

     O goddess, say, shall I deduce my rhimes / From the dire nation in its early times?

   • 1689 (indicated as 1690)​, [John Locke], An Essay Concerning Humane Understanding. […], London: […] Thomas Basset, […], OCLC 153628242 ↗:

     Reason […] is nothing but the faculty of deducing unknown truths from principles or propositions that are already known.

   • 1822, [Walter Scott], Peveril of the Peak. [...] In Four Volumes, volume (please specify ), Edinburgh: Printed for Archibald Constable and Co.; London: Hurst, Robinson, and Co., OCLC 2392685 ↗:

2. (obsolete) To take away; to deduct; to subtract.

   to deduce a part from the whole

3. (obsolete, Latinism) To lead forth.

   • He should hither deduce a colony.

• (reach a conclusion by applying rules of logic) conclude, infer

• (reach a conclusion by applying rules of logic) induce

• adduce
• conduct
• conducive
• deduct
• deduction
• duke
• induce
• introduce
• reduce
• reduction
• seduce
• subduction
• transduce

• French: déduire
• German: folgern, ableiten, herleiten
• Italian: dedurre
• Portuguese: deduzir
• Russian: де́лать вы́вод
• Spanish: deducir