国防工业，亦称作军事工业，是由涉及军事装备及设备硏究、开发生产与服务的政府与商业产业组成，其中包括：

亦可包括以下：

The arms industry, a global business, manufactures and sells weapons and military technology and equipment. It consists of commercial industry involved in research and development, engineering, production, and the servicing of military material, equipment, and facilities. Arms-producing companies, also referred to as defense contractors or as the military industry, produce arms mainly for the armed forces of states. Departments of government also operate in the arms industry, buying and selling weapons, munitions and other military items. Products include guns, ammunition, missiles, military aircraft, military vehicles, ships, electronic systems, and more. The arms industry also provides other logistical and operational support.