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1. The prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons)
   "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"
   - non-proliferation

Derived forms: nonproliferations, non-proliferations

Type of: bar, prevention

Antonym: proliferation

Encyclopedia: Nonproliferation