/ Dictionary / Index N NSC: Meaning and Definition of Find definitions for: NSC Pronunciation: [key] National Safety Council. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nsc (Thesaurus) NSA NSF 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