Definition of deduction in English:

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Pronunciation: /dɪˈdʌkʃ(ə)n/


[mass noun]
1The action of deducting or subtracting something: the dividend will be paid without deduction of tax
More example sentences
  • Four years ago the Inland Revenue had a look at this automatic deduction of tax and estimated that over the past few years it had taken £300 million from four million people who should have paid no tax at all.
  • Such income will henceforth be taxed in the hands of the recipients at the rates applicable to them, and will be subject to tax deduction at source at the rate of 10%.
  • Historically, the main advantages of investing offshore have been that returns are paid without any deduction of tax, and the authorities in your home country are told nothing about your wealth.
subtraction, taking away, taking off, withdrawal, abstraction, removal, debit, docking, discounting
informal knocking off
1.1 [count noun] An amount that is or may be deducted from something, especially from taxable income or tax to be paid: tax deductions
More example sentences
  • She would have to itemize deductions on her tax returns and there are income limitations.
  • Income and social security deductions are only part of the picture.
  • Use the following chart as a guideline to determine if you are able to get a tax deduction for the amount you contribute.
stoppage, subtraction
2The inference of particular instances by reference to a general law or principle: the detective must uncover the murderer by deduction from facts [count noun]: we do not yet know if these deductions are correct Often contrasted with induction.
More example sentences
  • No architect of these institutions has proceeded by deduction from general principles.
  • The mathematician establishes results by logical deduction.
  • But it is perhaps truer of Spinoza than of his contemporaries that his enterprise was one of radical deduction from first principles.
conclusion, inference, supposition, hypothesis, thesis, assumption, presumption, suspicion, conviction, belief;
results, findings


Late Middle English: from Latin deductio(n-), from the verb deducere (see deduce).

Words that rhyme with deduction

abduction, conduction, construction, destruction, eduction, effluxion, induction, instruction, introduction, misconstruction, obstruction, production, reduction, ruction, seduction, suction, underproduction

For editors and proofreaders

Line breaks: de|duc¦tion

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