AskDefine | Define deduction

Dictionary Definition

deduction

Noun

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

User Contributed Dictionary

English

Pronunciation

Noun

  1. that which is deducted; that which is subtracted or removed
  2. a sum that can be removed from tax calculations; something that is written off
    You might want to donate the old junk and just take the deduction.
  3. a conclusion; that which is deduced, concluded or figured out
    He arrived at the deduction that the butler didn't do it.
  4. the ability or skill to deduce or figure out; the power of reason
    Through his powers of deduction, he realized that the plan would never work.
  5. a. a process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
    b. a conclusion reached by this process

Translations

that which is deducted; that which is subtracted or removed
a sum that can be removed from tax calculations; something that is written off
a conclusion; that which is deduced, concluded or figured out
the ability or skill to deduce or figure out; the power of reason
a process of reasoning

Extensive Definition

Deduction can refer to one of the following usages:
  • Deductive reasoning, inference in which the conclusion is of no greater generality than the premises
  • Natural deduction, an approach to proof theory that attempts to provide a formal model of logical reasoning as it "naturally" occurs
deduction in French: Déduction
deduction in Georgian: დედუქცია
deduction in Finnish: Deduktio

Synonyms, Antonyms and Related Words

Baconian method, a fortiori reasoning, a posteriori reasoning, a priori reasoning, abatement, ablation, abrasion, abridgment, abstraction, accord, addition, adjunct, affairs, affiliation, affinity, agio, alleviation, alliance, allowance, analysis, approximation, assemblage, association, attenuation, bank discount, bond, breakage, cash discount, chain discount, charge-off, closeness, cogitation, combination, concession, conclusion, connectedness, connection, consequence, consequent, consideration, contemplation, contiguity, contraction, contrariety, corollary, credit, cut, dampening, damping, dealings, decrease, decrement, decrescence, deductive reasoning, deflation, deliberation, demonstration, depreciation, depression, derivation, diminishment, diminution, discount, discourse, discourse of reason, discursive reason, disjunction, dockage, drawback, dying, dying off, epagoge, erosion, extenuation, fade-out, filiation, finding, generalization, homology, hypothesis and verification, illation, induction, inductive reasoning, inference, intercourse, intimacy, judgment, junction, kickback, languishment, lessening, letup, liaison, link, linkage, linking, logical thought, lowering, meditation, miniaturization, minus, mitigation, musing, mutual attraction, nearness, particularization, penalty, penalty clause, percentage, philosophical induction, philosophy, pondering, premium, price reduction, price-cut, proof, propinquity, proximity, purification, rapport, ratiocination, rationalism, rationality, rationalization, rationalizing, reason, reasonableness, reasoning, rebate, rebatement, reduction, refinement, reflection, refund, relatedness, relation, relations, relationship, relaxation, removal, result, rollback, rumination, sagging, salvage, scaling down, sequitur, setoff, similarity, simplicity, sophistry, specious reasoning, speculation, subduction, sublation, subtraction, sweet reason, syllogism, syllogistic reasoning, sympathy, synthesis, takeoff, taking away, tare, thinking, tie, tie-in, time discount, trade discount, tret, underselling, union, weakening, withdrawal, write-off
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