1. One who, or that which, multiplies or increases number.
2. Math. The number by which another number (the
3. Physics An instrument for multiplying or increasing by repetition or accumulation the intensity of a force or action, as heat or electricity. It is particularly used to render such a force or action appreciable or measurable when feeble. See Thermomultiplier.
n : the number by which a multiplicand is multiplied [syn: multiplier