|n.||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.|
|Noun||1.||subtraction - 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"|
|2.||subtraction - the act of subtracting (removing a part from the whole); "he complained about the subtraction of money from their paychecks"|
addition - the act of adding one thing to another; "the addition of flowers created a pleasing effect"; "the addition of a leap day every four years"