• WordNet 3.6
    • n deduction the act of subtracting (removing a part from the whole) "he complained about the subtraction of money from their paychecks"
    • n deduction the act of reducing the selling price of merchandise
    • n deduction reasoning from the general to the particular (or from cause to effect)
    • n deduction something that is inferred (deduced or entailed or implied) "his resignation had political implications"
    • n deduction an amount or percentage deducted
    • n deduction a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Nearly 22,000 checks will be deducted from the wrong account over the next hour.
    • Deduction Act of deducting or taking away; subtraction; as, the deduction of the subtrahend from the minuend.
    • Deduction Act or process of deducing or inferring. "The deduction of one language from another.""This process, by which from two statements we deduce a third, is called deduction ."
    • Deduction 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."
    • Deduction That which is or may be deducted; the part taken away; abatement; as, a deduction from the yearly rent in compensation for services; deductions from income in calculating income taxes.
    • ***
Century Dictionary and Cyclopedia
    • n deduction A drawing or tracing out and setting forth.
    • n deduction The act of deriving; derivation.
    • n deduction In logic, derivation as a result from a known principle; necessary inference; also, the result itself, as so concluded. As a term of logic, it is a translation of Aristotle's ἀπαγωγή (translated deductio by Boëthius), and properly signifies an illative descent from a general principle to the result of that principle in a special case; it is specially used by Aristotle when there is a doubt whether the case truly comes under the principle. By the older logicians it is little used, and not with any exact signification. In modern times it has been chiefly employed by those who hold that all reasoning is either a descent from generals to particulars (deduction) or an ascent from particulars to generals (induction). See deductive reasoning, under deductive.
    • n deduction The act of deducting or taking away; subtraction; abatement: as, the deduction of the subtrahend from the minuend; prompt payment will insure a large deduction.
    • n deduction A payment; a statement of payments.
    • ***
Chambers's Twentieth Century Dictionary
    • n Deduction (1) the act of deducing: that which is deduced: the drawing of a particular truth from a general, antecedently known, as distinguished from Induction, rising from particular truths to a general; (2) the act of deducting: that which is deducted: abatement
    • ***


  • Henry David Thoreau
    “We do not learn by inference and deduction and the application of mathematics to philosophy, but by direct intercourse and sympathy.”
  • Lewis H. Lapham
    “I never can pass by the Metropolitan Museum of Art in New York without thinking of it not as a gallery of living portraits but as a cemetery of tax-deductible wealth.”
  • Xaviera Hollander
    Xaviera Hollander
    “Actually, if my business was legitimate, I would deduct a substantial percentage for depreciation of my body.”
  • Albert Einstein
    “The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.”
  • Shelby Friedman
    Shelby Friedman
    “Income tax time is when you test your powers of deduction.”
  • American Proverb
    American Proverb
    “No matter how bad a child is, he is still good for a tax deduction.”


Webster's Revised Unabridged Dictionary
L. deductio,: cf. F. déduction,
Chambers's Twentieth Century Dictionary
L. deducĕre, deductumde, from ducĕre, ductum, to lead.


In literature:

Moreover, they are subject to arbitrary deductions from their wages.
"The Condition of the Working-Class in England in 1844 with a Preface written in 1892" by Frederick Engels
One is the inductive method, the other the deductive.
"Public Speaking" by Clarence Stratton
This should make us pause and reflect, before allowing this deduction to be accepted.
"The Healthy Life, Vol. V, Nos. 24-28" by Various
Thinking and deduction .
"We Philologists, Volume 8 (of 18)" by Friedrich Nietzsche
In some of them War Savings subscriptions are obtained by means of deductions from wages.
"The War After the War" by Isaac Frederick Marcosson
Of its actual state our data are not definite enough to furnish much deduction.
"Other Worlds" by Garrett P. Serviss
Here, then, as in proof, induction is implied in deduction, and deduction in induction.
"Logic" by Carveth Read
What made her furious was the absolute stupidity of their deductions.
"Parrot & Co." by Harold MacGrath
In many inductive lessons the step of application really involves a process of deduction.
"Ontario Normal School Manuals: Science of Education" by Ontario Ministry of Education
The tendency of his deductions was negative, and hence we rank him as no ordinary agent toward the growth of historic doubt.
"History of Rationalism Embracing a Survey of the Present State of Protestant Theology" by John F. Hurst

In poetry:

There was once a man who made a weird machine,
Employing dynamite and kerosene.
His subsequent destruction
Was a matter of deduction,
And a circumstance that might have been foreseen.
"An Error in Creation" by C J Dennis

In news:

Local property taxes are up for many, snow is sucking up budget bucks by the plow-full, town-imposed non-deductible fees are testing public resistance and we're still being warned that town services and jobs face the scalpel.
It was a mission of grave importance, scientific deduction, physical stamina, gastronomical fortitude and a fine way to spend a lovely fall Sunday.
Officials in both communities are concerned they would end up losing money if the state takes over tax-collection duties and deducts an excessive administrative fee.
Congress split on payroll tax deduction .
Fiscal battle over mortgage deduction.
Washington should stay away from touching the mortgage interest tax deduction , warns the US housing industry.
Powerful interests defend mortgage deduction.
The National Association of Home Builders and other lobbying groups will make their case in Washington to defend the tax deduction for mortgage interest payments.
Don't Eliminate the Charitable Tax Deduction .
Should the Charitable Tax Deduction Be Eliminated.
Some in Congress are looking at ending the mortgage interest tax deduction .
Clothing donations to qualified charitable organizations are tax deductible .
Tax Deduction Cap Deserves Closer Scrutiny, Baucus Says.
Presidential candidates vow to cut deductions.
Romney, President Obama leave much unsaid on plans for eliminating tax deductions.

In science:

The next step is to “solve” the model, i.e deductively work out its experimental consequences.
DNA Elasticity : Topology of Self-Avoidance
In fact, they tolerate contradictions within the conclusions, but reject the principle of explosion according to which a single contradiction entails the deduction of every formula.
Preferential and Preferential-discriminative Consequence relations
Natural deduction and coherence for weakly distributive categories.
Simple free star-autonomous categories and full coherence
Parigot. λµ-calculus: an algorithmic interpretation of classical natural deduction.
Simple free star-autonomous categories and full coherence
Natural deduction and coherence for weakly distributive categories.
Simple multiplicative proof nets with units