Deduction \De*duc"tion\, n. [L. deductio: cf. F. d['e]duction.]

1. Act or process of deducing or inferring.

The deduction of one language from another. --Johnson.

This process, by which from two statements we deduce a third, is called deduction. --J. R. Seely.

2. Act of deducting or taking away; subtraction; as, the deduction of the subtrahend from the minuend.

3. That which is deduced or drawn from premises by a process of reasoning; an inference; a conclusion.

Make fair deductions; see to what they mount. --Pope.

4. That which is deducted; the part taken away; abatement; as, a deduction from the yearly rent.

Syn: See Induction.

Source: Webster's Revised Unabridged Dictionary (1913)