Subtraction word meaning and definition

[noun] the act of subtracting (removing a part from the whole); "he complained about the subtraction of money from their paychecks"
[noun] an arithmetic operation in which the difference between two numbers is calculated; "the subtraction of three from four leaves one"; "four minus three equals one"

\Sub*trac"tion\, n. [L. subtractio a drawing back. See {Subtract}, and cf. {Substraction}.] 1. The act or operation of subtracting or taking away a part. 2. (Math.) The taking of a lesser number or quantity from a greater of the same kind or denomination; an operation for finding the difference between two numbers or quantities. 3. (Law) The withdrawing or withholding from a person of some right to which he is entitled by law. Note: Thus the subtraction of conjugal rights is when either the husband or wife withdraws from the other and lives separate without sufficient reason. The subtraction of a legacy is the withholding or detailing of it from the legatee by the executor. In like manner, the withholding of any service, rent, duty, or custom, is a subtraction, for which the law gives a remedy. --Blackstone.

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