Proliferation

Noun

1. The process by which an organism produces others of its kind; breeding, propagation, procreation, reproduction.
2. The act of increasing, rising, or proliferating; augmentation, amplification, enlargement, escalation, aggrandizement. In particular, the spread (proliferating) of biochemical, nuclear and other weapons of mass destruction to countries not originally involved in developing them.
3. In particular, the spread (proliferating) of biochemical, nuclear and other weapons of mass destruction to countries not originally involved in developing them.
4. The result of building up; buildup, accretion.