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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.
Matrix multiplication. Multiplication of two matrices illustrated with a 4Ã3 and a 3Ã2 matrix with arbitrary symbols. In mathematics, matrix multiplication or the matrix product is a binary operation that produces a matrix from two matrices.