1. (n.) 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.

2. (n.) 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.

3. (n.) An increase above the normal number of parts, especially of petals; augmentation.

4. (n.) The art of increasing gold or silver by magic, -- attributed formerly to the alchemists.

access accession accretion accrual accruement accumulation addition advance aggrandizement amplification appreciation approximation ascent augmentation ballooning begetting bloating boom boost breeding broadening buildup crescendo crossbreeding development differentiation dissogeny division edema elevation endogamy engenderment enlargement equation evolution expansion extension extrapolation flood fructification gain generation greatening growth gush hike inbreeding increase increment inflation integration interpolation inversion involution jump leap linebreeding mounting multiple multiplication table multiplier multiplying notation outbreeding practice procreation production productiveness proliferation prolification propagation proportion pullulation raise reduction reproduction rise snowballing spread subtraction surge swelling tables transformation tumescence up upping upsurge upswing uptrend upturn waxing widening xenogamy