de ‧ duc ‧ tion AC /dɪˈdʌkʃ ə n/ BrE AmE noun [uncountable and countable]
[ Word Family: adjective : ↑ deducible , ↑ deductive ; verb : ↑ deduce ; noun : ↑ deduction ]
1 . the process of using the knowledge or information you have in order to understand something or form an opinion, or the opinion that you form:
Children will soon make deductions about the meaning of a word.
2 . the process of taking away an amount from a total, or the amount that is taken away:
After deductions for tax etc, your salary is about £700 a month.