किसी चीज़ के न फैलने की क्रिया, अवस्था या भाव।

परमाणु अप्रसार विश्व शांति में सहायक होगा।
अप्रसरण, अप्रसार, अविस्तरण, अविस्तार, असंतति, असन्तत

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, nonproliferation