2. (Science: mathematics) To add (any given number or quantity) to itself a certain number of times; to find the product of by multiplication; thus 7 multiplied by 8 produces the number 56; to multiply two numbers. See the note under Multiplication.
(Science: optics) See lens.
Origin: F. Multiplier, L. Multiplicare, fr. Multiplex manifold. See Multitude, Complex.