[non-proh-lif-uh-rey-shuh n]


the action or practice of curbing or controlling an excessive, rapid spread: nonproliferation of nuclear weapons.
failure or refusal to proliferate, as in budding or cell division.


pertaining to diplomatic agreements limiting the spread of nuclear weapons.

Origin of nonproliferation

First recorded in 1960–65; non- + proliferation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for nonproliferation



  1. limitation of the production or spread of something, esp nuclear or chemical weapons
  2. (as modifier)a nonproliferation treaty
failure or refusal to proliferate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012