the act or process of multiplying or the state of being multiplied.

Arithmetic . a mathematical operation, symbolized by a × b, a ? b, a ? b, or ab, and signifying, when a and b are positive integers, that a is to be added to itself as many times as there are units in b; the addition of a number to itself as often as is indicated by another number, as in 2×3 or 5×10.

Mathematics . any generalization of this operation applicable to numbers other than integers, as fractions or irrational numbers.

noun

aggrandizement , amplification , augment , augmentation , boost , buildup , enlargement , escalation , growth , hike , jump , proliferation , raise , rise , swell , upsurge , upswing , upturn , accretion , development , breeding , procreation , propagation , spawning