nonproliferation
//ˌnɒn.prəˌlɪf.əˈreɪ.ʃən//
Noun
1
The prevention of the spread or increase of something, especially nuclear weapons or other weapons of mass destruction.
The treaty aims to promote nuclear nonproliferation worldwide.
2
A policy or set of measures aimed at limiting the spread of nuclear weapons to countries that do not already possess them.
The treaty promotes nonproliferation by preventing the spread of nuclear weapons to new countries.