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Webster's Dictionary (1865)

De-dŭc'tion, n.

noun

(de-dŭk'shun), n. [Lat. deductio, Fr. déduction, Pr. deductio, Sp. deduccion, It. deduzione.]

  1. The act or method of deducing, inferring, or concluding. “The deduction of one language from another.” Johnson.
  2. The act of deducting or taking away; as, the deduction of the subtrahend from the minuend.
  3. That which is deduced; an inference; a conclusion.

Make fair deductions; see to what they mount. Pope. 4. That which is deducted; the part taken away; abatement; as, a deduction from the yearly rent. Syn.—See INDUCTION.