Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “deduction”

deduction

noun [C or U] uk   /dɪˈdʌk.ʃən/ us  

deduction noun [C or U] (THINKING)

C2 the process of reaching a decision or answer by thinking about the known facts, or the decision that is reached: Through a process of deduction, the detectives discovered the identity of the killer. All we can do is make deductions from the available facts.

deduction noun [C or U] (TAKING AWAY)

C1 the calculation of taking an amount or a part of something away from a total, or the amount that is taken away: The interest I receive on my savings account is paid after the deduction of tax. After deductions (= expenses on which tax does not have to be paid), his taxable income is $30,000. US and Australian English an amount that is taken away from the money you are paid before you officially receive it
Compare
(Definition of deduction from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of deduction?
Add Cambridge dictionaries to your browser to your website

Definitions of “deduction” in other dictionaries

Word of the Day

dawn on sb

If a fact dawns on you, you understand it after a period of not understanding it.

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More