Meaning : The prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons).
Example :
They protested that the nonproliferation treaty was just a plot to maintain the hegemony of those who already had nuclear weapons.
Nuclear disarmament and nonproliferation are closely related goals.
Synonyms : non-proliferation
Translation in other languages :
A rapid increase in number (especially a rapid increase in the number of deadly weapons).
The proliferation of nuclear weapons.