/ Dictionary / Index N nuclearism: Meaning and Definition of Find definitions for: nu•cle•ar•ism Pronunciation: (n'klē-u-riz"um, ny'- or, by metathesis, -kyu lu-), [key] — n. a political philosophy maintaining that nuclear weapons are the best means of assuring peace and of attaining political goals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nuclear fusion nuclear isomer Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language