Proliferation definition

(uncountable) The spread of biochemical, nuclear and other weapons of mass destruction to countries not originally involved in developing them.
noun
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Proliferation is a rapid increase in numbers or rapid growth.

When a country is quickly building up more weapons including nuclear weapons, this is an example of nuclear proliferation.

If you start out with one rabbit and within a month you end up with five, this is an example of proliferation of rabbits.

noun
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(uncountable) The process by which an organism produces others of its kind; breeding, propagation, procreation, reproduction.
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(countable) The result of building up; buildup, accretion.
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Other Word Forms

Noun

Singular:
proliferation
Plural:
proliferations

Origin of proliferation