cordite Syllabification: (cord·ite)Pronunciation: /ˈkôrˌdīt/Definition of cordite noun a smokeless explosive made from nitrocellulose, nitroglycerine, and petroleum jelly, used in ammunition. Origin: late 19th century: from cord (because of its stringlike appearance) + -ite1cordite in other Oxford dictionaries Definition of cordite in the British & World English dictionary