deduction Pronunciation: /dɪˈdʌkʃən/Translate deduction | into French | into German | into Italian Spanish translation of deductionn 1 u c (subtraction) deducción (f) descuento (m) 2 u c (reasoning, conclusion) deducción (f)deduction in other Oxford dictionaries Definition of deduction in the British & World English dictionary Definition of deduction in the US English dictionary