deduction Meaning, Definition & Usage

  1. noun a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket
    tax deduction; tax write-off.
  2. noun an amount or percentage deducted
    discount.
  3. noun something that is inferred (deduced or entailed or implied)
    entailment; implication.
    • his resignation had political implications
  4. noun reasoning from the general to the particular (or from cause to effect)
    deductive reasoning; synthesis.
  5. noun the act of subtracting (removing a part from the whole)
    subtraction.
    • he complained about the subtraction of money from their paychecks
  6. noun the act of reducing the selling price of merchandise
    discount; price reduction.

WordNet

De*duc"tion noun
Etymology
L. deductio: cf. F. déduction.
Definitions
  1. Act or process of deducing or inferring.
    The deduction of one language from another. Johnson.
    This process, by which from two statements we deduce a third, is called deduction. J. R. Seely.
  2. Act of deducting or taking away; subtraction; as, the deduction of the subtrahend from the minuend.
  3. That which is deduced or drawn from premises by a process of reasoning; 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.

Webster 1913