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multiplication. n. 1. (Mathematics) an arithmetical operation, defined initially in terms of repeated addition, usually written a Ã b, a.b, or ab, by which the product of two quantities is calculated: to multiply a by positive integral b is to add a to itself b times.
Webster Dictionary(0.00 / 0 votes)Rate this definition: Multiplication(noun) the act or process of multiplying, or of increasing in number; the state of being multiplied; as, the multiplication of the human species by natural generation. Multiplication(noun) the process of repeating, or adding to itself, any given number or quantity a certain number of times; commonly, the process of ascertaining by a briefer computation the result of such repeated additions; also, the rule by which the operation is performed; -- the reverse of division.