There are multiple definitions - click on the translation that matches your context.

Abzug

Substantiv

full

deduction

noun

Definitions of deduction

English

a figure that is taken away from a total amount of money

What deductions are being taken from this person's salary?

English

when you reach a conclusion, decision or answer after thinking about all of the available facts

He was able to discover the probable killer through a process of deduction.