n.

1. 扣除，减除[U]
2. 扣除额，减除额[C]
   deductions from pay for insurance and pension

   从薪水中扣除的保险费和养老金费

3. 推论；演绎（法）[U][C][+that]
   Her deduction that he was now dead was correct.

   她关于他已去世的推论是正确的。

n.

1. the action of deducting.
   ▸an amount that is or may be deducted.
2. the inference of particular instances by reference to a general law or principle. Often contrasted with induction.
   ▸a conclusion that has been deduced.