/ Dictionary / Index N NUCFLASH: Meaning and Definition of Find definitions for: NUCFLASH Pronunciation: (nk'flash", nyk'-), [key] — n. a report of highest precedence notifying the president, secretary of defense, or their deputies of an accidental or unauthorized nuclear-weapon launch or of a nuclear attack. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nucellus nucha Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language