- the act or process of deducting or subtracting
- something, esp a sum of money, that is or may be deducted
- the process of reasoning typical of mathematics and logic, whose conclusions follow necessarily from their premises
- the conclusion of such an argument
WordReference Random House Learner's Dictionary of American English © 2017
- the act or process of deducting;
- something that is or may be deducted:She took deductions for a home office and other business expenses from her taxes.
- the act or process of deducing.
- something that is deduced:His astute deduction was worthy of Sherlock Holmes.
- a process of reasoning in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
- a conclusion reached by this process. Cf. induction (def. 4).
- Latin dēductiōn- (stem of dēductiō) a leading away. See deduct, -ion
- late Middle English deduccioun ( 1400–50