What is the meaning of deduction?

noun

• A reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket.
  • synonyms: tax write-off, tax deduction
• An amount or percentage deducted.
  • synonyms: discount
• Something that is inferred (deduced or entailed or implied. )
  • usage: "his resignation had political implications"
  • synonyms: entailment, implication
• Reasoning from the general to the particular (or from cause to effect.
  • synonyms: deductive reasoning, synthesis
• The act of subtracting (removing a part from the whole. )
  • usage: "he complained about the subtraction of money from their paychecks"
  • synonyms: subtraction
• The act of reducing the selling price of merchandise.
  • synonyms: discount, price reduction