National Security Council Syllabification: (Na·tion·al Se·cu·ri·ty Coun·cil) (abbreviation: NSC)Definition of National Security Council a body created in the US by Congress after World War II to advise the president (who chairs it) on issues relating to national security in domestic, foreign, and military policy. National Security Council in other Oxford dictionaries Definition of National Security Council in the British & World English dictionary
