1. The act or operation of subtracting or taking away a part.
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.
Origin: L. Subtractio a drawing back. See Subtract, and cf. Substraction.