海空军 Traditional form: 海空軍 Pinyin (reading): hǎikōngjūn Definitions: navy and air force Characters: 海 - sea, ocean; maritime 空 - hollow, empty, deserted, bare 军 - army, military; soldiers, troops Traditional characters: 海 - sea, ocean; maritime 空 - hollow, empty, deserted, bare 軍 - army, military; soldiers, troops