deduction

noun

1. (countable, uncountable)That which is deducted; that which is subtracted or removed.

   “Near-synonyms: extract, reduction; see also Thesaurus:decrement”

2. (countable, uncountable)That which is deducted; that which is subtracted or removed.

   “standard deduction”

   “You might want to donate the old junk and just take the deduction.”

3. (countable, uncountable)That which is deducted; that which is subtracted or removed.
4. (countable, uncountable)A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.

   “He arrived at the deduction that the butler didn't do it.”

   “An unkinder deduction, considering only the Select Committee's report and discounting rumours of wayward conclusions by the Stedeford Group, would be that if one inquisition doesn't produce the desired answers, the Minister's policy is "try, try again"—or should one say "fight, fight, fight again".”

5. (countable, uncountable)A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.

   “Through his powers of deduction, he realized that the plan would never work.”