/ Dictionary / Index N nonproliferation: Meaning and Definition of Find definitions for: non•pro•lif•er•a•tion Pronunciation: (non"prō-lif"u-rā'shun), [key] — 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. —adj. pertaining to diplomatic agreements limiting the spread of nuclear weapons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nonproliferation (Thesaurus) nonprofit non-pros Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language