deduction Pronunciation: /dɪˈdʌkʃn/Translate deduction | into German | into Italian | into Spanish French translation of deductionn 1 (from wages) retenue (f) (from sur); (of tax) prélèvement (m) 2 (conclusion) déduction (f), conclusion (f)deduction in other Oxford dictionaries Definition of deduction in the British & World English dictionary Definition of deduction in the US English dictionary