Adjacent Words

Deduction definitions

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Webster's 1828 Dictionary

DEDUCTION, n.
1. The act of deducting.
2. That which is deducted; sum or amount taken from another; defalcation; abatement; as, this sum is a deduction from the yearly rent.
3. That which is drawn from premises; fact, opinion, or hypothesis, collected from principles or facts stated, or established data; inference; consequence drawn; conclusion; as, this opinion is a fair deduction from the principles you have advanced.

WordNet (r) 3.0 (2005)

n
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, deduction]
2: an amount or percentage deducted [syn: deduction, discount]
3: something that is inferred (deduced or entailed or implied); "his resignation had political implications" [syn: deduction, entailment, implication]
4: reasoning from the general to the particular (or from cause to effect) [syn: deduction, 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, deduction] [ant: addition]
6: the act of reducing the selling price of merchandise [syn: discount, price reduction, deduction]

Merriam Webster's

noun Date: 15th century 1. a. an act of taking away <deduction of legitimate business expenses> b. something that is or may be subtracted <deductions from his taxable income> 2. a. the deriving of a conclusion by reasoning; specifically inference in which the conclusion about particulars follows necessarily from general or universal premises — compare induction b. a conclusion reached by logical deduction

Britannica Concise

In logic, a type of inference distinguished by the fact that if the premises of the inference are all true, then the conclusion necessarily follows and hence is also true. This feature distinguishes deduction from induction. The above definition of deduction is hypothetical and speaks only about the formal relationship between the premises and the conclusion of a deduction; it does not imply that all the premises or the conclusion of any deduction must in fact be true. Thus, the following inference is deductive, even though the second premise and the conclusion are untrue: "No odd natural number is divisible without remainder by 2; 4 is an odd natural number; therefore, 4 is not divisible without remainder by 2."

Oxford Reference Dictionary

n. 1 a the act of deducting. b an amount deducted. 2 a the inferring of particular instances from a general law (cf. INDUCTION). b a conclusion deduced. Etymology: ME f. OF deduction or L deductio (as DEDUCE)

Webster's 1913 Dictionary

Deduction De*duc"tion, n. [L. deductio: cf. F. d['e]duction.] 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.

Collin's Cobuild Dictionary

(deductions) 1. A deduction is a conclusion that you have reached about something because of other things that you know to be true. It was a pretty astute deduction... N-COUNT: oft N about n 2. Deduction is the process of reaching a conclusion about something because of other things that you know to be true. ...a case that tested his powers of deduction. 3. A deduction is an amount that has been subtracted from a total. ...your gross income (before tax and National Insurance deductions)... N-COUNT 4. Deduction is the act or process of subtracting an amount of money from a total amount. After the deduction of tax at 20 per cent, the interest rate will be 6.2 per cent.

Soule's Dictionary of English Synonyms

n. 1. Subtraction, withdrawal, removal, taking out or away. 2. Abatement, allowance, defalcation, reduction, discount. 3. Inference, conclusion, consequence, corollary.

Moby Thesaurus

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